Detecting the isoflurane in the air of workplaces with chromatographic method / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To establish a solvent desorption Gas chromatographic method for detecting the isoflurane in air of workplaces.</p><p><b>METHODS</b>This method is based on "Standardization of methods for determination of toxic substances in workplace air".</p><p><b>RESULTS</b>This method presents the linear relation with the minimum detectable limit 1.0 µg/ml and the minimum detectable concentration 0.07 mg/m(3). The precision (RSD) was 0.5% ∼ 5.0%, the mean dsorption efficiencies were 96.7% ∼ 98.9%, the absorption efficiencies were 92.1% ∼ 100%, the breakthrough volume was 3.7 mg isoflurane/100 mg active carbon. Other volatile organic solvents (Sevoflurane, Enflurane and Ethyl Alcohol) did not interfere the detection. The sample could be stored in the active carbon tube at least for 10 days.</p><p><b>CONCLUSION</b>This method is meet the requirement of GBZ/T 210.4-2008 "Guide for establishing occupational health standards-Part4: Determination methods of air chemicals in workplace" and is feasible for determining the isoflurane in the air of workplaces.</p>

Determination of phosphoric acid in the air of workplace by ion chromatography / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To develop a method to determine phosphoric acid in the air of workplace by ion chromatography.</p><p><b>METHODS</b>Phosphoric acid was collected by millipore filter and washed by deionized water then detected by ion chromatography.</p><p><b>RESULTS</b>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).</p><p><b>CONCLUSION</b>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.</p>