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河北医学  2019, Vol. 25 Issue (11): 1933-1936    DOI: 10.3969/j.issn.1006-6233.2019.11.046
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一种快速测定饮用天然矿泉水中阴离子合成洗涤剂的方法研究
王占辉1, 吴艳玲1
1.河北省承德市疾病预防控制中心, 河北 承德 067000;
2.河北省承德市双滦区疾病预防控制中心, 河北 双滦 067101
A Method for Rapid Determination of Anionic Synthetic Detergent in Natural Mineral Water for Drinking
WANG Zhanhui, WU Yanling, DIAO Danhong, et al
Chengde Center for Disease Control and Prevention, Hebei Chengde 067000, China
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摘要 目的:建立一种天然矿泉水中阴离子合成洗涤剂的快速测定方法。方法:准确吸取20.00mL待测水样于25mL具塞比色管中,加入4mL亚甲蓝缓冲溶液,混匀后加入4mL三氯甲烷,塞紧盖子。连续振摇120次(45S),倒入100mL分液漏斗中,静置分层。于分液漏斗颈部塞入一小团脱脂棉,分出三氯甲烷相于650nm波长,以三氯甲烷为参比,测量吸光度。结果:本方法基于国标亚甲蓝光谱法的原理,建立了一种快速测定天然矿泉水中阴离子合成洗涤剂的方法,该方法线性关系良好,相关系数(r)为0.9998,最低检测质量浓度为0.02mg/L。该方法对样品进行低、中、高三个浓度水平的加标实验,回收率为97.4%~106.3%,精密度为0.68%~2.34%(n=6),对有证标准物质进行了测定,结果满意。结论:本检测方法操作简便、精密度好、准确度高、检测限低,适合各类饮用天然矿泉水中阴离子合成洗涤剂的检测。
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关键词 阴离子合成洗涤剂饮用天然矿泉水分光光度法    
AbstractObjective: To establish a rapid method for the determination of anionic synthetic detergents in natural mineral water. Methods: Accurately draw 20mL of water sample to be tested into 25mL plug colorimetric tube, add 4 mL of methylene blue buffer solution, mix well, add 4 mL of chloroform, and close the lid. The mixture was shaken continuously for 120 times (45 S), and then poured into a 100 ml separatory funnel, standing and stratified. A small mass of absorbent cotton was push into the neck of the separatory funnel, The absorbance of chloroform phase was measured at a wavelength of 650 nm using the absorbance of chloroform as a reference. Results:The linear relationship between anionic synthetic detergents in natural mineral water was quickly determined by optimized methylene blue spectrophotometry with good Results. The correlation coefficient (r) was 0.9998, the lowest detection concentration was 0.02 mg/L, and the samples were low, medium and high. The spiked concentration test was carried out at a concentration level of 97.4% to 106.3%, and the precision was 0.68% to 2.34% (n=6). The certified standard materials were determined and the Results were satisfactory. Conclusion: This test method is easy to operate, has good precision, high accuracy and low detection limit. It is suitable for the detection of anionic synthetic detergents in all kinds of drinking natural mineral water.
Key wordsAnionic synthetic detergents    Natural mineral water    Spectrophotometry
    
基金资助:河北省承德市科学技术研究与发展计划项目,(编号:201804A052)
通讯作者: 吴艳玲,刁丹红1,夏文娟2,李彩云1,赵国良1   
引用本文:   
王占辉, 吴艳玲. 一种快速测定饮用天然矿泉水中阴离子合成洗涤剂的方法研究[J]. 河北医学, 2019, 25(11): 1933-1936.
WANG Zhanhui, WU Yanling, DIAO Danhong, et al. A Method for Rapid Determination of Anionic Synthetic Detergent in Natural Mineral Water for Drinking. HeBei Med, 2019, 25(11): 1933-1936.
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