Spectrophotometric determination of NO(2) in the working atmosphere.
A method is described for determining NO(2) in workplace atmospheres, based on its reaction with bis(diethyldithiocarbamato)copper(II) in toluene. NO(2) is absorbed from an air sample by a toluene solution of Cu(dtc)(2) and the decrease in the initial absorbance at 437 nm is measured. The method has been compared with the Saltzman method. The interference of NO, Cl(2), O(3), SO(2) and other gases has been studied. The NO(2) concentration range of the method is 1-500 mg m (3).
Zhelyazkova
B G
BG
Department of Chemistry, Sofia University, 1126 Sofia, Bulgaria.
Vardev
P B
PB
Yordanov
N D
ND