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目的建立食(饮)具表面残留的阴离子合成洗涤剂的连续流动注射测定法。方法用100 mL蒸馏水清洗食(饮)具表面残留的阴离子合成洗涤剂制成样液,采用SKALARSAN++型连续流动注射仪对样液中阴离子合成洗涤剂的含量进行测定。结果方法的线性范围为10μg/L~500μg/L,相关系数为0.999 7,检出限为2μg/L,相对标准偏差为1.6%~4.4%。在(50、100、200)μg/L 3个加标浓度水平的回收率在91.2%~104.1%之间。结论本方法准确度和精密度好,检出限低,适用于批量检测食(饮)具表面残留阴离子合成洗涤剂。
OBJECTIVE To establish a continuous flow injection method for determination of anionic synthetic detergent residues on food surface. Methods 100 mL of distilled water was used to wash the residual anionic synthetic detergent on the surface of food and drink, and the content of anionic synthetic detergent in the sample solution was determined by using SKALARSAN ++ continuous flow injection apparatus. Results The linear range of the method was 10μg / L ~ 500μg / L, the correlation coefficient was 0.999 7, the detection limit was 2μg / L and the relative standard deviation was 1.6% -4.4%. The recoveries at the three spiked levels (50, 100, 200) μg / L ranged from 91.2% to 104.1%. Conclusion The method has good accuracy and precision and low detection limit. It is suitable for the batch detection of residual anionic synthetic detergent on the surface of food and drink.