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首页> 外文期刊>Analytical chemistry >HPLC Determination of Cyanuric Acid in Swimming Pool Waters Using Phenyl and Confirmatory Porous Graphitic Carbon Columns
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HPLC Determination of Cyanuric Acid in Swimming Pool Waters Using Phenyl and Confirmatory Porous Graphitic Carbon Columns

机译：苯基和证实性多孔石墨碳柱高效液相色谱法测定游泳池水中的氰尿酸

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摘要

The chlorinated salts of cyanuric acid have found an important role in recreational swimming pool waters across the United States. Upon application to pool water, they can (1) release disinfectant chlorine or (2) stabilize the free available chlorine by acting as chlorine reservoirs in the form of cyanuric acid, preventing the photolytic destruction of residual chlorine by sunlight. Recommended levels of the cyanuric acid stabilizer are in the 10-100 mg/L concentration range according to the National Swimming Pool Foundation (San Antonio, TX). Two isocratic HPLC methods with UV detection (213 nm) employing phenyl and porous graphitic carbon (PGC) columns and phosphate buffer eluents (pH 6.7 and pH 9.1, respectively) were developed to accurately measure cyanuric acid in swimming pools. The two methods allowed fast separation and detection of the stabilizer in 4 (phenyl) and 8 (PGC) min. Both methods offered practical sensitivities with method detection limits of 0.07 (phenyl) and 0.02 mg/L (PGC). Neither one of the two methods required the use of sample cleanup cartridges. They exhibit chromatograms with excellent baseline stability enabling low-level quantitation. Most important, the PGC column had a useful lifetime of five months and 500 sample analyses/column. Eleven pool water samples were fortified with 4.8-50.0 mg/L stabilizer, and the average recovery was 99.8%. Finally, statistical analysis on the relative precisions of the two methods indicated equivalence at the 0.05 critical level.
机译：氰尿酸的氯化盐在美国各地的休闲游泳池水中已发现了重要的作用。应用于水池水时，它们可以（1）释放消毒剂氯或（2）通过充当氰尿酸形式的氯储存器来稳定游离的可用氯，防止阳光对残留氯的光解破坏。根据国家游泳池基金会（德克萨斯州圣安东尼奥市）的建议，氰尿酸稳定剂的推荐浓度范围为10-100 mg / L。开发了两种使用UV和紫外检测器（213 nm）的等度HPLC方法，分别使用苯基和多孔石墨碳（PGC）柱和磷酸盐缓冲液洗脱液（分别为pH 6.7和pH 9.1）来精确测量游泳池中的氰尿酸。两种方法可以在4（苯基）和8（PGC）分钟内快速分离并检测稳定剂。两种方法均具有实用的灵敏度，方法检测限为0.07（苯基）和0.02 mg / L（PGC）。两种方法均不需要使用样品净化盒。它们显示出具有出色基线稳定性的色谱图，可进行低水平定量。最重要的是，PGC色谱柱的使用寿命为五个月，并进行500次样品分析/色谱柱。 11个池水样品使用4.8-50.0 mg / L的稳定剂进行强化，平均回收率为99.8％。最后，对这两种方法的相对精度的统计分析表明在0.05的临界水平上是等效的。

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