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Piezoelectric detectors for organophosphorus compounds and pesticides.

Authors
Scheide-EP; Guilbault-GG
Source
Anal Chem 1972 Sep; 44(11):1764-1768
NIOSHTIC No.
20036828
Abstract
A quartz piezoelectric crystal coated with a substrate has been used for the detection of small mass changes caused by the selective adsorption of organophosphorus compounds and pesticides. Incorporation of the crystal into a variable oscillator circuit and measurement of the change in frequency of the crystal due to the increase in mass allows a highly sensitive indication of the amount of organophosphorus compound present in the atmosphere down to the part per million level. Instrumentation is relatively inexpensive and can be easily used in the field. Analysis is nondestructive and requires very little time. AT cut quartz crystals with fundamental frequencies of 9.0 MHz were coated with various inorganic substrates and these were evaluated as to selectivity and sensitivity with respect to organophosphorus pollutants. Other parameters that affect the efficiency of the detector were also studied and evaluated. The detector has potential use as both an air pollution sensor and a specific gas chromatography detector.
Keywords
Air-samples; Chemical-hypersensitivity; Chromatography; Exposure-assessment; Exposure-levels; Exposure-methods; Organo-phosphorus-compounds; Organo-phosphorus-pesticides; Pesticide-industry; Pesticide-residues; Pesticides-and-agricultural-chemicals; Pollutants; Pollution
Contact
Eugene P. Scheide, Chemistry Louisiana State University Chemistry Department New Orleans, LA 70122
CODEN
ANCHAM
Publication Date
19720901
Document Type
Journal Article
Funding Amount
55401
Funding Type
Grant
Fiscal Year
1972
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-000345
Issue of Publication
11
ISSN
0003-2700
Source Name
Analytical Chemistry
State
LA
Performing Organization
Louisiana St Univ New Orleans, New Orleans, Louisiana
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