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| Determination of Nitrite and Nitrate in Meat Powder Samples from Food Analysis Performance Assessment Scheme Using Ion Chromatography with Suppressed Conductivity Detection |
| MO Zimei, YANG Li, ZHENG Juanmei*, CHEN Ningzhou, WANG Jing |
| Guangxi-ASEAN Center For Food and Drug Safety Control, Nanning 530021, China |
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Abstract This paper is aimed to establish a method for the determination of nitrite and nitrate in meat powder samples from Food Analysis Performance Assessment Scheme (FAPAS) by ion chromatography with suppressed conductivity detection. Samples were extracted ultrasonically in a water bath, and the extract was purified on cation exchange resin column before analysis. The separation was performed on DioneX IonPacTM AS19 anion column with KOH solution as eluent, and the analytes were detected by an AERS 500 (4 mm) anion suppressor and a conductivity detector. The standard curve method was used for quantitative analysis. The linear range of nitrate was from 0.10 to 4.00 mg/L, and the average recovery was 99.53% with a relative standard deviation (RSD) of 0.60% (n = 9). The linear range of nitrite was from 0.50 to 20.00 mg/L, and the average recovery was 99.29% with a RSD of 0.25% (n = 9). In addition, both correlation coefficients were 0.999 9. In conclusion, the results of this comparison were satisfactory, and the method was scientific, reliable, and suitable for the determination of nitrite and nitrate in cooked meat products with complex matrix.
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2018, Vol. 32 
