Analysis of formic acid in air samples
- 1 February 1978
- journal article
- research article
- Published by Taylor & Francis in Aihaj Journal
- Vol. 39 (2) , 151-153
- https://doi.org/10.1080/0002889778507729
Abstract
Air containing formic acid is drawn through a midget impinger containing 15 ml of 0.1 N NaOH at a rate of 1 l/min for 42 min. An aliquot from the impinger is treated with an equal volume of ethanol-sulfuric acid mixture in a gastight reaction vial to produce ethyl formate. Because ethyl formate is volatile, an analysis of its vapor contained in the vial (headspace analysis) can be performed. The ethyl formate is analyzed by gas chromatography and its quantity is proportional to the quantity of formic acid contained in the reaction vial. With a relative SD of 11% the method is precise enough for evaluating airborne formic acid at 0.1 of threshold limit value of 9 mg/m3.This publication has 0 references indexed in Scilit: