Determination of hydrogen peroxide in workplace air: interferences and method validation

Abstract

A dynamic system for the generation of stable hydrogen peroxide test atmospheres was applied to the evaluation of samplers used for the determination of hydrogen peroxide in workplace air. The system is able to generate gas mixtures of between 0.1 and 10 ppm at different combinations of relative humidity (20-80%) and temperature (10-30 degrees C). Gaseous hydrogen peroxide is sampled on glass filters impregnated with Ti(IV) chloride and sulfuric acid and analyzed by UV spectroscopy. An interference was observed due to the acid catalyzed decomposition of peroxyacetic acid to hydrogen peroxide. This was significantly reduced by applying high sample flow rates and by lowering the concentration of sulfuric acid. The performance of the sampler and sources of uncertainties were tested according to the European Standard EN 1076.

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

“…The variance in the quantified H 2 O 2 concentrations is further accentuated when calculating the %FE for H 2 O 2 production following the electrochemical measurement (Figure 4c), where the %FE difference between KMnO 4 titration (80.5 %) and TiOSO 4 (90.3 %) spectrophotometry is almost 10 %, a substantial disparity between the two detection methods. It has been previously reported that the TiOSO 4 method may be susceptible to interferences from anions like CO 3 2− present in the electrolyte [42,43] …”

“…It has been previously reported that the TiOSO 4 method may be susceptible to interferences from anions like CO 3 2À present in the electrolyte. [42,43]…”

Vapor Phase Hydrogen Peroxide – Method for Decontamination of Surfaces and Working Areas from Organic Pollutants

“…It is necessary to evaluate the resistivity to hydrogen peroxide and the amount of residual hydrogen peroxide left in the material. There are several analytical methods for the determination of hydrogen peroxide such as reduction by SnCl2 (Egerton et al, 1954), thiocyanate method (Egerton et al, 1954;Ikarashi et al, 1995), enzymatic method of dimerization of p-hydroxyphenolic acid (Christensen, 2000), color changes of Ti 2 (SO 4 ) 3 or TiCl 4 by spectrophotometric detection (Egerton et al, 1954), UV spectroscopy, titration of KMnO 4 , I 3 -, or Ce(SO 4 ) 2 (Klassen et al, 1994), electrochemical, polarographic and other methods (Higashi et al, 2005).…”

Comparing Methods for Quantifying Electrochemically Accumulated H2O2

“…For example, H 2 O 2 is quantified in the Li–O 2 battery field by combining titration and spectrophotometry using titanium oxysulfate (TiOSO 4 ) as an assay. , The standard error of the method was reported to be 5.8% at concentrations of 1 ppm of H 2 O 2 . However, anions in electrolytes commonly used for electrochemical water oxidation, i.e., CO 3 – and SO 3 2– , were found to interfere with the determination . Ultimately, regardless of the choice of measurement method, we recommend that the H 2 O 2 quantification procedure be explicitly vetted in the electrochemical environment being studied, and protocols and procedures for performing the measurement should be described in detail to ensure repeatability and to enable comparison across laboratories.…”

“…39 However, anions in electrolytes commonly used for electrochemical water oxidation, i.e., CO 3 − and SO 3 2− , were found to interfere with the determination. 40 Ultimately, regardless of the choice of measurement method, we recommend that the H 2 O 2 quantification procedure be explicitly vetted in the electrochemical environment being studied, and protocols and procedures for performing the measurement should be described in detail to ensure repeatability and to enable comparison across laboratories.…”