摘要
目的：建立测定痕量亚硝酸根的新方法。方法：基于盐酸介质中，亚硝酸根与萘乙二胺发生亚硝化反应，亚硝化产物在碱性溶液中聚集，产生了强烈的共振散射现象．据此建立了共振散射光谱法测定亚硝酸根的新方法。结果：方法的线性范围为0～800ng／ml，检出限7．3ng／ml。样品加标回收率为99．6％-103．5％。结论：该方法简便快速，常见物质干扰小，用于蔬菜中痕量亚硝酸根的测定，结果满意。
Objective： To develop a simple and sensitive method for the determination of trace nitrite in vegetable samples. Methods： Based on the nitrosation reaction of nitrite with naphthyl ethylendiamine in hydrochloric acid medium, the nitrosation product aggregated in alkaline solution, which resulted in the increase of resonance light scattering, a resonance light scattering method was proposed for the determination of trace nitrite. Results：The detection limit and the linear range for nitrite were 7. 3 ng/ml and 0 - 800 ng/ml, respectively. The recovery rate was 99. 6% - 103. 5%. Conclusion：The method is quick and simple. It can be applied to the determination of trace nitrite in vegetable samples with satisfactory results.
出处
《中国卫生检验杂志》
CAS
2006年第12期1420-1421,1428,共3页
Chinese Journal of Health Laboratory Technology
基金
安徽省教育厅自然科学基金资助项目(2006KJ127B)
关键词
共振光散射
萘乙二胺
亚硝酸根
亚硝化
Resonance light scattering
Naphthyl ethylenediamine
Nitrite
Nitrosation
