MilliporeSigma
  • Application of colorimetric indicators and thermo-hand method to determine base permeation through chemical protective gloves.

Application of colorimetric indicators and thermo-hand method to determine base permeation through chemical protective gloves.

Journal of occupational and environmental hygiene (2005-03-04)
Evanly Vo
ABSTRACT

The aim of this study was to assess the use of colorimetric indicator pads and the thermo-hand method for detection of inorganic/organic base permeation of chemical protective gloves under simulated in-use conditions. Breakthrough times for four types of gloves were determined based on the color change of pads and ranged from 3 to 10 min for butylamine, from 4 min to >4 hours for diisopropylamine, from 6 min to >4 hours for triethylamine, and >4 hours for sodium hydroxide. Quantification was performed for butylamine, diisopropylamine, and triethylamine by gas chromatography following solvent desorption. These chemicals exhibited >99% adsorption on the pads at spiking levels of 1.08-1.11:g for each base. The recovery for the system was calculated for each chemical, with results ranging from 50-74% (RSD < or = 5%) for these bases over the spiking range 0.22-1.11 microg. The quantitative mass of the bases on the pads at the time of breakthrough detection ranged from 118-121, 117-120, and 109-116 microg/cm2 for butylamine, diisopropylamine, and triethylamine, respectively. The thermo-hand test method and base indicators together should find utility in detecting, collecting, and quantitatively analyzing base permeation samples under simulated in-use conditions.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Diisopropylamine, ≥99.5%
Sigma-Aldrich
Diisopropylamine, purified by redistillation, 99.95%
Sigma-Aldrich
Lithium diisopropylamide, 97%
Sigma-Aldrich
Lithium diisopropylamide solution, 2.0 M in THF/heptane/ethylbenzene
Supelco
Diisopropylamine, analytical standard
Sigma-Aldrich
Diisopropylamine, puriss. p.a., ≥99.0% (GC)