连续流动分析仪测定餐(饮)具中阴离子合成洗涤剂的研究

Research on the Determination of Anion Synthetic Detergent in the Catering Units by Continuous Flow Analysis

目的建立餐(饮)具中阴离子合成洗涤剂残留的连续流动分析仪检测方法。方法将待检的餐(饮)具用适量纯净水冲洗内表面或浸泡,制成定量样本待测液,采用连续流动分析仪对餐(饮)具中阴离子合成洗涤剂残留进行定量检测。结果方法线性范围0.010~1.00 mg/L,检出限为0.000 53 mg/100 cm2,线性回归方程Y=-0.003 4+0.315 7X,相关系数r=0.999 5,回收率为90.2%~97.7%,低、中、高含量的精密度分别为6.42%、2.79%、0.58%。结论连续流动分析仪测定餐(饮)具中的阴离子合成洗涤剂残留量方法操作简便,检测速度快,检测结果准确,尤其适合批量样品的检测。

Objective To develop a continuous flow analysis method for residue determination of anion synthetic detergent among the catering units. Methods The internal surface of utensils in the catering units was flushed or immersed by purified water, then we got quantitative samples. We detected the samples by continuous flow analysis. Results The correlation coefficient(r) was 0.9995 in the range of 0.010~1.00 mg/L,the detection limit was 0.000 53 mg/100 cm^2,the linear regression equation Y=-0.003 4+0.315 7 X,the recoveries were between 90.2% and 97.7%,the precision of low-concentration、middle-concentration and high-concentration were 6.42%、2.79%、0.58%. Conclusion The residue determination of anion synthetic detergent in the catering units by continuous flow analysis was simple operation、rapid、accurate,it was suitable for mass samples analysis.