{"id":472,"date":"2021-09-14T07:22:47","date_gmt":"2021-09-14T07:22:47","guid":{"rendered":"https:\/\/foodsafety.upb.ro\/?page_id=472"},"modified":"2021-11-29T09:11:26","modified_gmt":"2021-11-29T09:11:26","slug":"laboratorul-de-pregatire-si-prelevare-probe","status":"publish","type":"page","link":"https:\/\/foodsafety.upb.ro\/en\/laboratorul-de-pregatire-si-prelevare-probe\/","title":{"rendered":"Laboratorul de pregatire si prelevare probe"},"content":{"rendered":"\t\t
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Laboratorul de preg\u0103tire \u0219i prelevare probe<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tSub\u021biere
ionic\u0103<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tUltra
microtom<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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supercritic\u0103<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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climatic\u0103<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tCamer\u0103 de lucru<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tTratamente termice gaze<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tTratamente termice
in vid<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPreg\u0103tire probe
biologice<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tEchipament de digestie \u00een c\u00e2mp de microunde<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tEchipament pentru extrac\u021bie Soxhlet<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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precizie<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPrelucrare
probe<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tMineralizator cu microunde pentru ICPMS<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPlasma
cleaner<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPres\u0103
\u00eenc\u0103lzire<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPres\u0103 pentru \u00eenglobare la cald<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tUltracentrifug\u0103
podea<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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Laboratorul va con\u0163ine echipamentele necesare pentru preg\u0103tirea \u00een condi\u0163ii optime a probelor ce urmeaz\u0103 a fi procesate. Este binecunoscut faptul c\u0103, \u00een foarte multe cazuri, rezulatele sunt puternic influen\u0163ate de modul de prelevare \u015fi procesare a probelor, motiv pentru care, \u00een foarte multe cazuri, metodele standardizate\/omologate\/acreditate impun at\u00e2t condi\u0163iile de determinare prin tehnica respectiv\u0103 c\u00e2t \u015fi modul de prelevare \u015fi preg\u0103tire a probelor \u015fi chiar modalitatea de procesare a rezultatelor.<\/p>

\nDintre echipamentele ce urmeaz\u0103 a fi achizi\u0163ionate cele mai importante sunt: echipamente de descompunere\/digestie \u00een c\u00e2mp de microunde, moar\u0103 cu bile, liofilizator, pres\u0103, ultracentrifug\u0103 \u015fi alte echipamente caracteristice unui laborator de preg\u0103tire probe (balan\u0163e, b\u0103i cu ultrasunete, b\u0103i de termostatare, agitatoare, ni\u015fe, etuve etc.). Dotarea acestui laborator, pentru a putea preg\u0103ti probele conform standardelor \u00een vigoare se ridic\u0103 la ~12,5 mil RON \u015fi este proiectat pentru a deservi laboratoarelor de analiz\u0103 \u015fi pentru a asigura minimul de dot\u0103ri necesare pentru realizarea unor opera\u0163ii legate de procesarea sau testarea alimentelor.<\/p>

De asemenea, aceste echipamente vor putea fi utilizate \u015fi \u00een scopul studierii influen\u0163ei unor factori accidentali, naturali sau de procesare asupra produselor alimentare.
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Dispozitiv de sub\u021biere ionic\u0103<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Dispozitivul de sub\u021biere ionic\u0103 FISCHIONE 1050 TEM Mill este un echipament folosit pentru crearea de lamele ultra-sub\u021biri, transparente, \u00een fascicol de electroni, pentru imagistic\u0103 \u0219i analiz\u0103 de microscopie electronic\u0103 prin transmisie (TEM). Acesta are \u00eencorporate dou\u0103 surse de ioni (gaz inert-Argon) ajustabile, controlate complet independent (True Focus), care pot fi direc\u021bionate c\u0103tre una sau ambele suprafe\u021be ale probei, permi\u021b\u00e2nd, dac\u0103 este necesar, prelucrarea simultan\u0103 din ambele p\u0103r\u021bi.\u00a0<\/span><\/p>

Specifica\u021bii tehnice:<\/b> tensiunea de accelerare a fasciculului de ioni \u00eentre 6 kV (pentru sub\u021biere brut\u0103) \u0219i 0,1 kV (pentru polizare), programabil\u0103 \u0219i reglabil\u0103 continuu prin software, curentul de fascicul de ioni reglabil continuu prin software, de la sute de nA p\u00e2n\u0103 la densit\u0103\u021bi de cel pu\u021bin 10 mA\/cm<\/span>2<\/span>, suportul de prob\u0103 permite rota\u021bia probei la 360\u00b0.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Ultramicrotom<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Ultramicrotomul Leica EM UC7 asigur\u0103 preg\u0103tirea de sec\u021biuni semi- \u0219i ultrasub\u021biri, precum \u0219i suprafe\u021be perfect netede ale probelor biologice \u0219i industriale, \u00een vederea analiz\u0103rii acestora cu ajutorul TEM, SEM, AFM \u0219i LM. Acest echipament ofer\u0103 nu doar sec\u021biuni ale probelor biologice (mono-strat de celule, \u021besuturi) pentru imunoflorescen\u021b\u0103 \u0219i imunostoechiometrie cu grosimea de 1-2 \u00b5m, ci \u0219i sec\u021biuni de 50-90 nm grosime pentru analize TEM conven\u021bionale la temperatura camerei.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Aparat pentru extrac\u021bie supercritic\u0103<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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– Sistemul SFT-150 este prev\u0103zut cu un vas de extrac\u021bie\/reac\u021bie care lucreaz\u0103 la presiune ridicat\u0103 (minim 68,9 MPa), cu o capacitate de minim 500 mL, permi\u021b\u00e2nd lucrul cu vase din o\u021bel inoxidabil interschimbabile de diverse volume.\u00a0<\/span><\/p>

– Incinta de lucru este prev\u0103zut\u0103 cu u\u0219\u0103 cu deschidere larg\u0103, aflat\u0103 deasupra recipientului principal de prelevare a probelor, pentru a facilita accesul la vasul de extrac\u021bie, valve \u015fi racorduri. Incinta de lucru trebuie s\u0103 fie proiectat\u0103 pentru un volum de pana la 2000 mL.<\/span><\/p>

– Sistemul este prev\u0103zut cu o valv\u0103 manual\u0103 dinamic\u0103\/static\u0103 care poate func\u021biona p\u00e2n\u0103 la o presiune maxim\u0103 de 15.000 PSI \u015fi poate fi folosit pentru aplica\u0163ii care presupun volum intern redus \u015fi suprafa\u0163\u0103 total\u0103 mic\u0103. Valvele sunt alc\u0103tuite dintr-un sistem de dou\u0103 componente ce asigur\u0103 \u00eenchidere direct\u0103 prin contact metal pe metal, ce asigur\u0103 o bun\u0103 rezisten\u021b\u0103 la presiuni \u0219i temperaturi \u00eenalte \u0219i la coroziune sau solven\u021bi agresivi. \u00cen acest caz, valvele vor fi operate manual.<\/span><\/p>

– Valva micrometric\u0103 manual\u0103 de restric\u021bie (reducere) este proiectat\u0103 s\u0103 asigure controlul precis al fluidelor \u0219i gazelor de la debite foarte mici la debite foarte mari cuprinse \u00eentre 1 mL\/min – 330 mL\/min, pentru CO<\/span>2<\/span> lichid la o presiune 10,000 PSI, ce permite separarea la rezolu\u021bie \u00eenalt\u0103 a anali\u021bilor cu grad similar de solubilitate.<\/span><\/p>

– Echipamentul este dotat cu un display de tip LED pentru afi\u0219area presiunii \u015fi temperaturii interne a vasului de lucru. Afi\u0219area temperaturii prevede temperatura intern\u0103.<\/span><\/p>

– \u00a0 Include sistem de pre\u00eenc\u0103lzire a fluidelor care asigur\u0103 cre\u0219terea temperaturii fluidului \u00eenainte ca acesta s\u0103 intre \u00een vasul de reac\u021bie.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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– Sistem de \u00eenc\u0103lzire cu domeniul de temperatur\u0103 pornind de la temperatura camerei p\u00e2n\u0103 la maxim 200\u00b0C.<\/p>

– Sistemul de r\u0103cire f\u0103r\u0103 ap\u0103 (care este inclus \u00een livrare) cu domeniul de temperatur\u0103 -10 – 30\u00b0C (stabilitatea temperaturii are o varia\u021bie maxim\u0103 de\u00a0 \u00b10,1\u00b0C) folose\u0219te un sistem de refrigerare care r\u0103ce\u0219te un tub inclus \u00eentr-o manta schimb\u0103toare de c\u0103ldur\u0103 prin care curge CO2\u00a0lichid din recipientul de stocare. CO2\u00a0suprar\u0103cit este apoi livrat direct c\u0103tre pompa pentru lichid supercritic.<\/p>

– Senzor de temperatur\u0103 situat \u00een interiorul vasului, \u00een contact direct cu fluidul, iar acurate\u021bea senzorului de temperatur\u0103 este de \u00b1 5%.<\/p>

– Pompa Isocratica co-solvent ce permite ad\u0103ugarea de solven\u021bi modificatori.<\/p>

– Debitmetru CO2\u00a0pentru reglarea debitului \u00een domeniul 0-35 SLPM (include fitinguri, tubulatur\u0103 \u0219i kit de montare) (P\/N 158Y1067B); debitul este cuprins \u00een intervalul 0,01 \u2013 10 mL\/min; eroarea debitului este \u00b12% pentru domeniul de debit 0,20 \u2013 10 mL\/min \u015fi maxim \u00b10,01 mL\/min pentru un domeniu de debit mai mic de 0,20 mL\/min; devia\u021bia standard a debitului nu dep\u0103\u0219e\u0219te 0,2% RSD.<\/p>

– Presiunea de lucru este cuprins\u0103 \u00een intervalul 0 – 8.000 PSI;<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Camer\u0103 climatic\u0103\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Camer\u0103 de lucru cu atmosfer\u0103 controlat\u0103\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Cuptor pentru tratamente termice cu conexiune la 3 gaze inerte<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Cuptor pentru tratamente termice \u00een vid\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Echipament de preg\u0103tire probe biologice<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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VitrobotTM (ROBOT de vitrificare) este un dispozitiv controlat \u00een totalitate prin PC pentru vitrificare (r\u0103cire rapid\u0103) a probelor lichide depuse pe grile TEM. Procesele de depunere (pipetare), scurgere \u0219i vitrifiere sunt complet automatizate.\u00a0<\/span><\/p>

Parametrii opera\u021bionali sunt reproductibili \u0219i rezultatul este strict controlat prin PC, ceea ce permite o procesare de \u00eenalt\u0103 calitate a probelor vitrifiate, cu un control u\u0219or \u0219i direct al procesului de vitrifiere.\u00a0<\/span><\/p>

Parametrii ce pot fi influen\u021ba\u021bi sunt temperatura, umiditatea, num\u0103rul de scurgeri, un num\u0103r de op\u021biuni critice pentru timp. Software-ul de control pentru Vitrobot\u2122\u00a0 utilizeaz\u0103 sistemul de operare Linux.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Echipamentul de digestie \u00een c\u00e2mp de microunde<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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– Echipamentul permite introducerea de gaz inert \u00een camera de reac\u021bie pentru pre-presurizare;<\/span><\/p>

– Temperatura maxim\u0103 de lucru este de 300\u00baC;<\/span><\/p>

– Capacitatea camerei de reac\u021bie cu vas de teflon este de 900 mL; echipamentul ofer\u0103 posibilitatea trat\u0103rii mai multor probe simultan (5 probe) prin introducerea \u00een camera de tratare a unui rack cu 5 vase, fiecare cu capacitatea de 40 mL;<\/span><\/p>

– Presiunea maxim\u0103 de lucru \u00een camera de reac\u021bie p\u00e2n\u0103 la 199 bari;<\/span><\/p>

– Puterea de microunde de 1500 W;<\/span><\/p>

– Sistem de agitare magnetic\u0103 cu antrenare mecanic\u0103 integrat pentru agitarea probelor \u00een fiecare vas;<\/span><\/p>

– Sistem de exhaustare integrat pentru extragerea vaporilor la deschiderea camerei de reac\u021bie;<\/span><\/p>

– Camera de reac\u021bie r\u0103cit\u0103 rapid cu ap\u0103 pentru cre\u0219terea productivit\u0103\u021bii;<\/span><\/p>

– Prev\u0103zut cu porturi: USB pentru printer, PS2 pentru mouse \u0219i tastatur\u0103, USB pentru memorie extern\u0103 \u0219i RJ45 pentru dispozitive externe.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Echipamentul pentru extrac\u021bie Soxhlet<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tehnica Soxhlet const\u0103 \u00een solubilizarea componentelor extractibile, prin picurarea unui solvent rece din refluxul unui condensator (opera\u021bia complet\u0103 necesit\u0103 un timp foarte lung). Echipamentul pentru extrac\u021bia solven\u021bilor are 3 locuri \u0219i este utilizat pentru produse solide sau semisolide, conform tehnicii Randall. Tehnica Randall realizeaz\u0103 o prim\u0103 faz\u0103 de extrac\u021bie prin imersarea probei \u00een solventul fierbinte, urm\u00e2nd apoi sp\u0103larea cu solvent rece; ultima opera\u021bie de solubilizare este realizat\u0103 de un solvent fierbinte, permi\u021b\u00e2ndu-se astfel reducerea timpului de extrac\u021bie.\u00a0<\/span><\/p>

Acest tip de echipament controlat de un microprocesor programabil permite optimizarea oper\u0103rii manuale, asigur\u0103 reducerea timpului de extrac\u021bie \u0219i recuperarea solven\u021bilor, reducerea polu\u0103rii \u0219i a costurilor de analiz\u0103 \u0219i este prev\u0103zut cu dou\u0103 leduri care vor prezenta \u00een mod constant temperatura actual\u0103 \u0219i timpul r\u0103mas pentru analiza respectiva. Realizeaz\u0103 separarea cantitativ\u0103 a unei substan\u021be sau a unui grup de substan\u021be (ex: con\u021binut de ulei) dintr-un amestec de substan\u021be solide sau semisolide \u0219i analiza \u0219i extrac\u021bia compu\u0219ilor solubili (gr\u0103simi, substan\u021be tensioactive, plastifian\u021bi, pesticide) cu solven\u021bi organici din alimente \u0219i produse alimentare, detergen\u021bi, cauciuc \u0219i plastic, produse farmaceutice, sol.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Ma\u0219in\u0103 pentru debitare de precizie\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Ma\u0219in\u0103 pentru prelucrat probe\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Mineralizator cu microunde pentru ICPMS\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Plasma cleaner\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Presa cu \u00eenc\u0103lzire\n\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Pres\u0103 pentru \u00eenglobare la cald\n\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Ultracentrifug\u0103 de podea\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Ultracentrifuga este construit\u0103 \u00een i\u00eentregime din materiale conforme cu RoHS \u0219i este prev\u0103zut\u0103 cu display LCD de 15″ \u00eenclinat, cu touch screen care permite utilizarea u\u0219oar\u0103 chiar \u0219i cu m\u0103nu\u0219i, precum \u0219i vizualizarea de la distan\u021b\u0103, din orice parte a laboratorului, a parametrilor de lucru: viteza de centrifugare, for\u021ba centrifugal\u0103, temperatura, viteza de accelerare\/decelerare, istoricul utiliz\u0103rilor \u0219i erorilor. Ultracentrifuga dispune de port USB pentru importul \u0219i exportul datelor \u0219i poate fi conectat\u0103 la o imprimant\u0103 pentru imprimarea datelor direct din soft-ul ultracentrifugei. Ultracentrifuga ofer\u0103 posibilitatea de avertizare a erorilor pe email sau telefon.<\/span><\/p>\n

Ultracentrifuga are capacitatea de a porni automat \u00een cazul \u00eentreruperii \u0219i apoi a revenirii tensiunii de alimentare, dac\u0103 perioada \u00eentreruperii a fost de scurt\u0103 durat\u0103 sau dac\u0103 exist\u0103 fluctua\u021bii de tensiune. \u00cen caz contrar, ultracentrifuga va porni la revenirea curentului electric, \u00eens\u0103 nu va continua protocolul de lucru, l\u0103s\u00e2nd acest lucru la latitudinea utilizatorului, deoarece este posibil ca anumi\u021bi parametri s\u0103 fi fost afecta\u021bi \u00een timpul \u00eentreruperii si, astfel, probele s\u0103 fie compromise. La revenirea curentului electric, utilizatorul are posibilitatea de a vedea toate informa\u021biile (durata \u00eentreruperii aliment\u0103rii, momentul revenirii curentului electric \u0219i al\u021bi parametri care pot influen\u021ba protocolul de lucru) pentru a putea decide dac\u0103 se continu\u0103 sau se reia protocolul de lucru.<\/span><\/p>\n

Ultracentrifuga dispune de sistem de \u00eenc\u0103lzire\/r\u0103cire ecologic care nu utilizeaz\u0103 compresor sau cluorofluorocarburi. Ultracentrifuga permite utilizarea de tuburi de diferite volume si materiale rezistente chimic<\/span><\/p>\n

Ultracentrifuga atinge nivelul de vid sub 0,7 Pa, dispun\u00e2nd de un sistem de control de precizie al vidului. Pentru aceasta, centrifuga este dotat\u0103 cu o pomp\u0103 de difuziune \u00een serie cu o pomp\u0103 de vid mecanic\u0103 care asigur\u0103 reducerea nivelului de vid la niveluri foarte joase (0,7 Pa). Simultan, sunt activi senzori de mare precizie \u0219i sisteme electronice de comand\u0103 \u0219i control care asigur\u0103 men\u021binerea constant\u0103 a nivelului de vid avansat pe toat\u0103 durata de rulare a protocolului de centrifugare. \u00cen permanen\u021b\u0103, nivelul de vid este afi\u0219at pe display in microni. Orice pierdere de vid datorat\u0103 unei sc\u0103p\u0103ri de etan\u0219are a camerei de centrifugare duce la oprirea centrifug\u0103rii \u0219i emiterea unor mesaje de avertizare. Sistemul de vid se declan\u0219eaz\u0103 automat la pornirea rul\u0103rii sau se poate comanda manual \u0219i se opre\u0219te automat la oprirea rul\u0103rii, atunci c\u00e2nd viteza rotorului scade sub 3000 rpm.<\/span><\/p>\n

Ultracentrifuga ofer\u0103 posibilitatea de pre-r\u0103cire \u0219i pre-\u00eenc\u0103lzire a rotorului, permite setarea mai multor moduri de centrifugare inclusiv centrifugare zonal\u0103 \u0219i centrifugare \u00een flux continuu, prezint\u0103 posibilitatea de validare pentru demonstrarea performan\u021belor, de simulare \u0219i estimare a localiz\u0103rii particulelor \u00een tub \u00een timpul centrifug\u0103rii \u0219i a alegerii optime tub-rotor \u0219i de calcul automat a coeficientului de sedimentare pentru masa molecular\u0103 \u00een timpul centrifug\u0103rii \u0219i poate analiza acizii nucleici AND \u0219i ARN.<\/span><\/p>\n

Caracteristici tehnice:<\/b><\/p>\n

– Vitez\u0103 de centrifugare maxim\u0103: 100.000 rpm<\/span><\/p>\n

– For\u021ba centrifugal\u0103 maxim\u0103: 802.000 x g<\/span><\/p>\n

– Acurate\u021bea pentru controlul vitezei: \u00b1 2 rpm<\/span><\/p>\n

– Domeniul de temperatur\u0103: 0-40\u00b0C \u0219i poate fi setat\u0103 \u00een pa\u0219i de 1\u00b0C<\/span><\/p>\n

– Acurate\u021bea temperaturii este de +\/-0,5\u00b0C fa\u021b\u0103 de temperatura setat\u0103<\/span><\/p>\n

– Centrifuga permite setarea timpului pana la 999 ore \u0219i 59 de minute<\/span><\/p>\n

– 1 rotor balansabil cu 6 locuri pentru tuburi de 38,5 mL model SW32Ti, cu urm\u0103toarele caracteristici: capacitate maxim\u0103 de 6 x 38,5 mL, viteza de centrifugare maxim\u0103 de 32.000 rpm, for\u021ba centrifugal\u0103 maxim\u0103 de 175.000 x g<\/span><\/p>\n

– 1 rotor la unghi fix \u00eenclinat cu unghi mic de \u00eenclinare (near-vertical), model NVT90, pentru separ\u0103ri rapide \u00een gradient de densitate, cu urm\u0103toarele caracteristici: capacitate maxim\u0103 de 8 x 5,1 mL, viteza maxim\u0103 de centrifugare de 90.000 rpm \u0219i for\u021ba centrifugal\u0103 maxim\u0103 de 645.000 x g. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Laboratorul de preg\u0103tire \u0219i prelevare probe Sub\u021biere ionic\u0103 Ultra microtom Extrac\u021bie supercritic\u0103 Camer\u0103 climatic\u0103 Camer\u0103 de lucru Tratamente termice gaze Tratamente termice in vid Preg\u0103tire probe biologice Echipament de digestie \u00een c\u00e2mp de microunde Echipament pentru extrac\u021bie Soxhlet Debitare precizie Prelucrare probe Mineralizator cu microunde pentru ICPMS Plasma cleaner Pres\u0103 \u00eenc\u0103lzire Pres\u0103 pentru \u00eenglobare la […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-472","page","type-page","status-publish","hentry"],"yoast_head":"\nLaboratorul de pregatire si prelevare probe - FoodSafety<\/title>\n<meta name=\"description\" content=\"Laboratorul va con\u0163ine echipamentele necesare pentru preg\u0103tirea \u00een condi\u0163ii optime a probelor ce urmeaz\u0103 a fi procesate.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/foodsafety.upb.ro\/en\/laboratorul-de-pregatire-si-prelevare-probe\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Laboratorul de pregatire si prelevare probe - 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