Determination of iodine in workplace air by inductively coupled plasma mass spectrometry
10.20001/j.issn.2095-2619.20230816
- VernacularTitle:电感耦合等离子体-质谱法测定工作场所空气中碘
- Author:
Sha ZHU
1
;
Yi HE
;
Tong CHANG
;
Qin WANG
;
Hui GAO
;
Tingting LI
;
Bin WEI
;
Yueyue LIU
;
Tao WANG
Author Information
1. Sanitary Inspection Department of Zibo Center for Disease Control and Prevention, Zibo, Shandong 255026, China
- Publication Type:Journal Article
- Keywords:
Iodine;
Workplace;
Air;
Solvent desorption;
Inductively coupled plasma-mass spectrometry
- From:
China Occupational Medicine
2023;50(4):451-454
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a solvent desorption inductively coupled plasma-mass spectrometry (ICP-MS) method for determination of iodine in workplace air. Methods Iodine in workplace air was collected with alkaline activated carbon tube and desorbed with 10.0 mL pure water or 20 mmol/L sodium bicarbonate solution. Rhenium-185 was used as an internal standard for quantification. The sample was determined in standard mode and kinetic energy discrimination collision (KED) mode by ICP-MS. Results In standard mode, iodine showed a good linear range in the concentration of 9.0 to 1 100.0 μg/L, with a correlation coefficient of 0.999 3 and a detection limit of 2.7 μg/L. In KED mode, iodine showed a good linear range in the concentration of 24.3 to 800.0 μg/L, with a correlation coefficient of 0.999 1 and a detection limit of 7.3 μg/L. The average desorption efficiency using pure water ranged from 99.1% to 106.7%, with within-run relative standard deviation (RSD) of 3.1% to 8.0% and between-run RSD of 4.9% to 9.3%. The average desorption efficiency using sodium bicarbonate solution ranged from 96.5% to 105.3%, with within-run RSD of 4.9% to 8.6% and between-run RSD of 2.5% to 9.9%. There were no statistical significant differences in the main effects of desorption solution, ICP-MS detection mode, their interaction on average desorption efficiency and within-run RSD (all P>0.05). Samples could be stored at room temperature for at least 7 days. Conclusion This method is highly sensitive, accurate, and suitable for the determination of iodine in workplace air. The sample pretreatment is simple and rapid.
