Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China.
Anal Methods. 2020 Dec 23;12(48):5916-5921. doi: 10.1039/d0ay01903h.
A simple, accurate and reliable analytical method for simultaneous determination of chlorite, chlorate, perchlorate and bromate in ozonated saline by using ion chromatography coupled with triple quadrupole mass spectrometry (IC-MS) has been developed. The use of silver (Ag) and hydrogen (H) OnGuard cartridges and 100-fold dilution were found to be simple and effective for sample pretreatment. Under optimized MS parameters, method validation was convincingly confirmed. A good linearity was obtained with regression correlation coefficients (R2) larger than 0.999. The mean relative recoveries of chlorite (ClO2-), chlorate (ClO3-), perchlorate (ClO4-), and bromate (BrO3-) ranged from 79.96 to 97.63%. The obtained limit of detection (LOD) was 1.00 μg L-1 for ClO2-, 0.10 μg L-1 for ClO3-, 0.04 μg L-1 for ClO4-, and 0.50 μg L-1 for BrO3-. Chlorate and bromate were only detected in ozonated samples. In addition, the concentration of chlorate and bromate was in direct proportion to the amount of ozone in saline.
建立了一种采用离子色谱-串联三重四极杆质谱（IC-MS）联用技术同时测定臭氧氧化盐水中亚氯酸盐、氯酸盐、高氯酸盐和溴酸盐的简单、准确、可靠的分析方法。采用银（Ag）和氢（H）OnGuard 柱和 100 倍稀释法进行样品预处理，操作简单、有效。在优化的 MS 参数下，方法验证令人信服。线性关系良好，回归相关系数（R2）大于 0.999。亚氯酸盐（ClO2-）、氯酸盐（ClO3-）、高氯酸盐（ClO4-）和溴酸盐（BrO3-）的平均相对回收率在 79.96%至 97.63%之间。得到的检测限（LOD）分别为 ClO2-为 1.00μg/L，ClO3-为 0.10μg/L，ClO4-为 0.04μg/L，BrO3-为 0.50μg/L。仅在臭氧氧化样品中检测到氯酸盐和溴酸盐。此外，盐水中氯酸盐和溴酸盐的浓度与臭氧的用量成正比。
