Improving the detection method for tin and its compounds in workplace air
10.11763/j.issn.2095-2619.2016.03.026
- Author:
Fu-Cheng YANG
1
;
Hang DU
1
;
Jin GONG
1
Author Information
1. Occupational Disease Prevention and Control Hospital in Chongqing Chongqing 400060,China
- Publication Type:Journal Article
- Keywords:
Workplace;
Air;
Tin and its compounds;
Flame atomic absorption spectrometry
- From:
China Occupational Medicine
2016;43(03):358-360
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE: To improve the standard detection method of tin and its compounds in the air of workplace.METHODS: During the sample preparation,the amount of sulfuric acid for air filter membrane digestion was reduced from its original 0. 5 m L( the standard method of flame atomic absorption spectrometry) to 0. 2 m L and no acid-driving after the membrane was digested. The amount of sulfuric acid given to the series of standards was the same as that of the membrane digestion. The samples were detected by the flame atomic absorption spectrometry method. RESULTS: The improved method showed a good linear range of tin as 0. 0-80. 0 mg / L,the regression equation was ^y = 0. 000 920 5 x-0. 000 635 0,the correlation coefficient was 0. 999 8,and the limit of detection was 1. 3 mg / L. The minimum detection concentration was0. 09 mg / m3( sample volume,75. 0 L). The relative standard deviation( RSD) of within-run precision was 3. 7%-4. 4%,and the RSD of between-run precision was 3. 4%-4. 6%. The sample recovery rates ranged from 98. 8% to 102. 5%.CONCLUSION: The improved method has the features of fast and accurate,high precision,good linear relationship and simple operation. It is suitable for detecting the mass concentration of tin in the workplace air.
