蔬菜中的硝酸盐、亚硝酸盐的气相色谱法测定

                      Methods: in the sample, the nitric acid was used as catalyst, and the temperature was controlled at 90 C below C to react with benzene to produce nitrobenzene, extraction, and then use 7990plus gas chromatography detection. Results: sample recovery rate of nitrate recovery rate in between 79.72% ~ 101.79%, nitrite recovery rate in 88.06% ~ 105.81%; coefficient of variation 3.22 ~ 5.93, nitrate minimum detection concentration 0.75 mg / kg). The minimum detectable concentration of nitrite is 0.609 mg / kg. Conclusion: this method is simple and rapid, and it can avoid the interference of other ions, and it can improve the sensitivity and accuracy, easy to operate and easy to operate. Multi use of one machine.

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