Main Title |
Analytical Methods for Pesticides. |
Author |
Burchfield., H. P. ;
|
CORP Author |
National Communicable Disease Center, Atlanta, Ga. |
Year Published |
1967 |
Stock Number |
PB-275 982 |
Additional Subjects |
Pesticides ;
Chemical analysis ;
Trace elements ;
Residues ;
Chromatography ;
Infrared spectroscopy ;
Reprints
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-275 982 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
16p |
Abstract |
The analysis of pesticide residues presents unusual problems because of the small amounts of materials that must be measured and the large amounts of interfering substances that must be removed. In general, it is necessary to be able to analyze for pesticides at the 0.01 to 10 ppm level in foods and animal tissues and at the ppt or ppb levels and upward in environmental pollution studies. After the pesticide has been extracted from the sample and interfering compounds removed, the residue is ready for analysis. These are usually colorimetric tests that are based on causing the pesticide to react with a reagent to produce a chromophore. During the past ten years colorimetric methods have been gradually superseded by chromatographic procedures in which a number of pesticides can be analyzed in the same operation. Three forms of chromatography are currently in use: paper, thin-layer, and gas. The use of paper chromatography is declining while that of thinlayer chromatography is increasing. However, gas chromatography is superior to both of these methods with respect to resolution and sensitivity. Also the use of infrared spectroscopy was discussed. |
Supplementary Notes |
Pub. in Lectures on Gas Chromatography, 1966, p121-136 1967. |
Availability Notes |
Included in the report, Journal Articles on Pesticide Chemical Analysis. Group 3, PB-275 978. |
Title Annotations |
Reprint: Analytical Methods for Pesticides, |
PUB Date Free Form |
1967 |
Category Codes |
7D; 6F; 68E; 99A; 57P |
NTIS Prices |
(Order as PB-275 978, MF A01) |
Primary Description |
500/01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
323730254 |
Origin |
NTIS |
Type |
CAT |