Document Detail


Permeation of Comite through protective gloves.
MedLine Citation:
PMID:  16713085     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The goal of the study was to assess how protective disposable (Safeskin) and chemical protective (Sol-Vex) nitrile gloves were against Comite emulsifiable concentrate formulation containing propargite (PROP) as active pesticidal ingredient, because there were no explicit recommendations for the gloves that should be worn for hand protection. The glove material was exposed in ASTM-type I-PTC-600 permeation cells at 30.0+/-0.5 degrees C, and gas chromatography-mass spectrometry used for PROP analysis. Aqueous solutions of Comite at 40.4 mg/mL permeated both Safeskin and Sol-Vex nitrile by 8h. Safeskin showed a mean PROP mass permeated of 176+/-27 microg after 8h compared with a mean mass permeated for Sol-Vex of 3.17+/-4.08 microg. Thus, Sol-Vex was about 56 times more protective than Safeskin for an 8-h exposure. However, the kinetics of the permeation revealed that Safeskin can be worn for at least 200 min before disposal. When undiluted Comite challenged both types of nitrile, much faster permeation was observed. Safeskin gloves showed two steady state periods. The first had lag times (t(l)) values of about 1h, although normalized breakthrough times (t(b)) were < 10 min. The second steady state rate (P(s)) was on average four times the rate of the first period, and the second steady state period t(l) was about three times as long as that of the first steady state period, and about the same t(l) as for the aqueous solution. Sol-Vex gloves exposed continuously to undiluted Comite permeated above the normalized breakthrough threshold beyond 2.7h. A risk assessment revealed that the PROP skin permeation rate of 7.1 ng cm(-2)h(-1) was much slower than the first steady state Safeskin glove P(s) of 62,000 ng cm(-2)h(-1). Infrared analysis showed that the glove surfaces were not degraded by the Comite challenge. The chemically protective Sol-Vex gloves protected adequately against undiluted formulation for about 2.7h, whereas they provided protection for nearly 8h when the formulation was diluted with water to the highest concentration for field application. In contrast, the disposable Safeskin gloves did not protect at all for the undiluted formulation, but did for 200 min when the formulation was diluted with water to the highest concentration for spraying.
Authors:
Hanaa Zainal; Shane S Que Hee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.     Date:  2006-03-28
Journal Detail:
Title:  Journal of hazardous materials     Volume:  137     ISSN:  0304-3894     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-08-28     Completed Date:  2007-01-09     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  165-71     Citation Subset:  IM    
Affiliation:
Department of Environmental Health Sciences, UCLA Center for Occupational and Environmental Health, School of Public Health, University of California at Los Angeles, 650 Charles Young Jr Drive South, Los Angeles, CA 90095-1772, USA.
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MeSH Terms
Descriptor/Qualifier:
Chromatography, Gas
Cyclohexanes / analysis*,  chemistry*
Gloves, Protective*
Hazardous Substances
Mass Spectrometry
Models, Statistical
Nitriles / analysis*
Risk
Spectrophotometry, Infrared
Spectroscopy, Fourier Transform Infrared
Time Factors
Grant Support
ID/Acronym/Agency:
R01 OS 03754 A//PHS HHS
Chemical
Reg. No./Substance:
0/Cyclohexanes; 0/Hazardous Substances; 0/Nitriles; 2312-35-8/Omite

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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