Analytical method for the determination of α,α-dichlorotoluene

Translation of DGUV Information 213-542 (former BGI 505-42 or ZH1/120.42)

CAS Number: 98-87-3

Synonym: Benzal chloride

Method 02 – GC – limited suitability: category E3

Sampling with a pump and adsorption on Tenax. Gas chromatography after desorption.

This method permits the determination of α,α-dichlorotoluene concentrations in working areas averaged over the sampling time after personal or stationary sampling.

Principle

With a pump a measured air volume is drawn through a Tenax tube. The adsorbed α,α-dichlorotoluene is then desorbed with n-hexane and determined by gas chromatography.

Limit of quantification (LOQ)

Absolute: 0.5 ng α,α-dichlorotoluene.

Relative: 0.01 mg/m³ α,α-dichlorotoluene for 48 L air sample, 1 mL desorption solution and 1 µL injection volume.

Issue

December 1996

The measuring method is of limited suitability (E3).

The complete measuring method is available in the Wiley Online Library: Method for the determination of α,α-dichlorotoluene (Analyses of Hazardous Substances in Air, Volume 5, 2002).

Go to the Wiley Online Library

Method 01 – GC – withdrawn

Sampling with a pump and adsorption on activated carbon. Gas chromatography after desorption.

This method permits the determination of α,α-dichlorotoluene concentrations in working areas averaged over the sampling time after personal or stationary sampling.

Principle

With a pump a measured air volume is drawn through a glass tube filled with activated carbon. The adsorbed α,α-dichlorotoluene is then desorbed with carbon disulfide and determined by gas chromatography.

Limit of quantification (LOQ)

Absolute: 0.2 ng α,α-dichlorotoluene.

Relative: 0.01 mg/m³ ≙ 0.0015 mL/m³ (ppm) α,α-dichlorotoluene for 20 L air sample, 1 mL desorption solution and 1 µl injection volume.

Issue

March 1989

Withdrawn

September 2014

The complete measuring method is available in the Wiley Online Library: Method for the determination of α,α-dichlorotoluene (Analyses of Hazardous Substances in Air, Volume 5, 2002).

Go to the Wiley Online Library