[Determination of phosphoric acid in the air of workplace by ion chromatography].

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.