青岛市售冬季大棚蔬菜中亚硝酸盐、硝酸盐含量的测定及安全性评价

Measurement and Safety Evaluation of Nitrite and Nitrate in Winter Tunnel Vegetables of Qingdao

摘要:

蔬菜中亚硝酸盐、硝酸盐含量是其卫生品质的重要指标之一，研究运用格里斯试剂比色法及紫外分光光度法检测了青岛市场上冬季大棚蔬菜217个样品中亚硝酸盐、硝酸盐含量。结果表明，青岛市七区蔬菜市场上叶菜类硝酸盐污染较为严重，大部分蔬菜的亚硝酸盐处于轻、中度污染状态。研究为当地蔬菜的安全供应提供了理论依据和数据支持。

Abstract:

Griess reagent-ultraviolet spectrophotometry method was used to determine the contents of nitrite and nitrate in 217 winter vegetable samples which sold in Qingdao. Results showed that nitrate contamination in leaf vegetables was more serious than other samples. Most samples were at the levels of light and moderate nitrite contamination. It can give theoretical basis and data support to the vegetables consumption to local residents.