Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Surface sampling for a pesticide in dust and small spills of a solid dye.

Authors
Que Hee-SS; Shen-Y; Tso-J-C
Source
Appl Occup Environ Hyg 2001 Aug; 16(8):809-815
NIOSHTIC No.
20041074
Abstract
The aim was to determine whether a published sampling technique for loose soil on hard surfaces achieved acceptable efficiency at surface dust/soil coverages of 10-20 mg/100 cm2. The sampler was a cordless personal sampling pump operated at 4.0 L/min connected to a cassette containing a filter, the cassette being also connected to a Tygon sampling probe that was moved manually on the surface to be sampled. Rhodamine 6G dye dust was evaluated at 10 mg/100 cm2 coverage at flow rates of 1.0-4.0 L/min. Two National Institute of Standards and Technology (NIST) standard reference materials (SRMs) were used for pesticide experiments: SRM2711 Montana Soil, and SRM1649a Urban Dust. The efficiencies for these SRMs were determined uncoated, and coated with 1300 g chlorpyrifos/g as a Lorsban 4E emulsifiable concentrate formulation. The 3-pass technique sampled both the pesticide-coated and uncoated dust and soil at >79 percent efficiency and at better than 16 percent coefficient of variation (CV) above 15 mg collected mass. Sampling at 20 mg/100 cm2 coverage lowered theCV to /= 1.5 L/min, but the CV for the 3-pass technique was <10 percent at 1.5-2.0 L/min, and <20 percent at 1.5-4.0 L/min. The efficiency for a 5-pass technique for the dye exceeded 90 percent at >/= 1.5 L/min with CVs <10 percent at 1.5, 2.0, 2.5, and 3.5 L/min. The weight change of the sampling probe and the cassette must be measured for accurate determination of low surface coverages rather than just the weight change of the filter alone. The method allows use of personal sampling equipment for aerosols to measure low coverages of loose dust, soil, and chemical solids on hard surfaces.
Keywords
Sampling-methods; Soil-sampling; Surface-properties; Pesticide-residues; Pesticides; Dust-sampling; Samplers; Pumps; Filters; Dyes; Standards; Analytical-processes; Equipment-reliability; Testing-equipment; Author Keywords: Pesticide; Surface Coverage; Chlorpyrifos; Spill; Dust; Soil
CODEN
AOEHE9
CAS No.
2921-88-2; 989-38-8
Publication Date
20010801
Document Type
Journal Article
Funding Type
Grant
Fiscal Year
2001
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-CCR-912034
Issue of Publication
8
ISSN
1047-322X
Priority Area
Mixed Exposures; Work Environment And Workforce
Source Name
Applied Occupational and Environmental Hygiene
State
CA
Performing Organization
University of California, Los Angeles, California
TOP