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Cholinesterase measurements with an automated kit.

Authors
Oliveira-GH; Henderson-JD; Wilson-BW
Source
Am J Ind Med 2002 Aug; 42(Suppl 2):49-53
NIOSHTIC No.
20032411
Abstract
Background: The Test-mate kit determines acetylcholinesterase (AChE, EC 3.1.1.7) and hemoglobin content of a drop of blood, displaying enzyme activities normalized to 25 degrees C. Previous models produced inconsistent results at different temperatures. This report focuses on the current model, ChE 400, and two instruments of a previous OP model. Methods: AChE activities were determined by the Ellman assay, using the three kits and a 96-well microplate reader. Temperatures ranged from 10 to 37 degrees C. Fetal bovine serum was the source of AChE. Results: Normalized activities decreased below 20 degrees C in the ChE model and below 25 degrees C in the OP models. Activities of the same serum sample differed between the three Test-mate kits, ranging from 1.03 to 1.49 moles/min/ml. Percent errors were greater than with the microplate reader at all temperatures. Conclusions: Neither we nor the manufacturer recommend the current Test-mate model for fieldwork. Nevertheless, there have been field measurements with Test-Mate kits, and we recommend that an enzyme activity standard be run in parallel with their use.
Keywords
Acetylcholinesterase; Blood-analysis; Blood-samples; Blood-sampling; Temperature-control; Temperature-effects; Temperature-measurement; Industrial-hazards; Industrial-safety-programs
Contact
Barry W. Wilson, Animal Science Department, Meyer Hall, University of California, 1 Shields Ave., Davis, CA 95616
CODEN
AJIMD8
Publication Date
20020801
Document Type
Journal Article
Email Address
bwwilson@ucdavis.edu
Funding Amount
1055222
Funding Type
Cooperative Agreement
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U07-CCU-906162
ISSN
0271-3586
Source Name
American Journal of Industrial Medicine
State
CA
Performing Organization
University of California - Davis
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