Briefing Session on Analysis of Nitrate/Nitrite and ... - uri=govtlab.gov
Briefing Session on Analysis of Nitrate/Nitrite and ... - uri=govtlab.gov
Briefing Session on Analysis of Nitrate/Nitrite and ... - uri=govtlab.gov
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Nit <strong>Nitrate</strong>/<strong>Nitrite</strong>: t /Nit it GL Testing T ti method th d for f Meat M t <strong>and</strong> d Meat M t Products P d t<br />
5. Heat for 15 minutes <strong>on</strong> a boiling water bath.<br />
66. Allow to cool <strong>and</strong> add 2 mL Carrez Carrez Solut<strong>on</strong> Solut<strong>on</strong> I <strong>and</strong> II II. Swirl Swirl after each additi<strong>on</strong>. additi<strong>on</strong><br />
7. Add 5 mL borax soluti<strong>on</strong> <strong>and</strong> transfer to a 200-mL volumetric flask.<br />
8. After st<strong>and</strong>ing for 30 minutes, make up to the mark with water, mix <strong>and</strong> filter<br />
through g a Whatman No. 41 filter paper. p p<br />
•Carrez Soluti<strong>on</strong> I: 10.6 g potassium<br />
ferrocyanide (II) (K 4[Fe(CN) 6].3H 2O) in<br />
distilled water<br />
•Carrez Soluti<strong>on</strong> II: 22.0 g zinc acetate<br />
<strong>and</strong> 3 mL glacial acetic acid in distilled<br />
water <strong>and</strong> dilute to 100 mL.<br />
NO -<br />
3 NO -<br />
2<br />
Cd<br />
Measure the NO -<br />
2 level
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