Determination of Trace-amount Calcium in Drinking Water by Microwave Plasma Torch Mass Spectrometry

作者：Zhong Tao; Yang Meiling; Pei Miaorong; Zhang Xinglei; Le Zhanggao; Wang Guangcai; Chen Huanwen^*

来源：Chemical Journal of Chinese Universities, 2016, 37(1): 26-30.

DOI：10.7503/cjcu20150503

• Microwave plasma torch
• Ion trap
• Mass spectroscopy
• Drinking water
• Calcium

A method for the determination of trace-amount calcium in drinking water by common organic mass spectroscopy was developed. Meanwhile, microwave plasma torch was introduced as ionization source and low-cost ion trap was introduced as mass analyzer. The operation parameters including flow rates of working gas and carrying gas were studied and optimized. Under the optimal experimental conditions, the micro-amount calcium in well water, tap water and bottled water were determined. In order to minimize the matrix effects in the real samples, the standard addition analysis method was employed. The limit of detection was 3. 88 ng/L, and the relative standard deviations ( RSD) were 2. 87%-8. 04%. Recoveries were determined between 101. 3% and 115. 1%. Experimental results indicated that the novel analytical strategy based on MPT-LTQ-MS for qualitation and quantitation of micro-amount calcium in drinking waters was simple and convenient. And its precision and accuracy meet the demand of determination. Furthermore, compared with ICP-MS, MPT-LTQ-MS was low-cost including instrument and maintenance. The proposed method is a novel and promising strategy for detection of micro-amount calcium in drinking waters.

• 出版日期2016-1-10
• 单位中国地质大学（北京）; 东华理工大学