[Determination of phosphoric acid in the air of workplace by ion chromatography]
Shuang-feng Li1, Juan Yi, Jin-min Cai
1Shenzhen Prevention and Treatment Center for Occupational Disease, Shenzhen 518001, China.
Objective:
To develop a method to determine phosphoric acid in the air of workplace by ion chromatography.
Methods:
Phosphoric acid was collected by millipore filter and washed by deionized water then detected by ion chromatography.
Results:
Linearity range of test was 0 ∼ 20 µg/ml, relative standard deviation (RSD) was 1.95% ∼ 3.31%, the elution efficiency was 103.0% ∼ 109.6%, determination limit was 0.1 µg/ml (when sample size was 20.01) concentration limit was 0.01 mg/m(3) (when the collected air was 75 L).
Conclusion:
This method is convenient for air collection, simple, with high sensitivity and good precision, is a good method for determination of phosphoric acid in the air of workplace.
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