A flow injection analysis system for monitoring silver (I) ion and iodine residuals in recycled water from recovery systems used for spaceflight

作者：Williamson Jill P; Emmert Gary L^*

来源：Analytica Chimica Acta, 2013, 792: 72-78.

DOI：10.1016/j.aca.2013.07.011

• Silver ion
• Iodine
• Disinfectant
• Flow analysis

A laboratory-built flow injection analyzer is reported for monitoring the drinking water disinfectants silver (I) ion and iodine in water produced from NASA's water recovery system. This analyzer uses spectrophotometric detection with a custom made 10 cm optical flow cell. Optimization and interference studies are discussed for the silver (I) ion configuration. Subsequent results using the silver (I) configuration with minor modifications and alternative reagents gave promising results for iodine determinations as well. The estimated MDL values for Ag+ and I-2 are 52 mu g L-1 Ag+ and 2 mu g L-1 I-2; the mean percent recoveries were 104% and 96.2% for Ag+ and I-2 respectfully; and percent relative standard deviations were estimated at 1.4% for Ag+ and 5.7% for I-2. The agreement of this potentially multifunctional analyzer to reference methods for each respective water disinfectant is measured using Bland-Altman analysis as well as more traditional estimates.

• 出版日期2013-8-20