| Autor: |
W L Chang, V J Meinen, G O Tannahill, P D Korger, C Vaught, B R Bennett, T Vonnahme, P J Conigliaro, G M Gentry, B Guzman, D Jorengby, D J Carlson, Dean C Kassera, J B Audino, W E Hodgins, E H Hayes, P Nielson, L Torma, R Martin, Phyllis K. Anderson, P Earls, J E Launer, T P Garbrecht |
| Rok vydání: |
1982 |
| Předmět: |
|
| Zdroj: |
Journal of AOAC INTERNATIONAL. 65:249-255 |
| ISSN: |
0004-5756 |
| Popis: |
A gas-liquid chromatographic method is described for the quantitative determination of pyrethrins and piperonyl butoxide in various formulations. The samples are diluted in acetone and analyzed by gas chromatography, with a flame ionization detector and a column packed with OV-101 or OV-1 on Chromosorb W (HP). The method was collaboratively studied with technical piperonyl butoxide and 3 pyrethrin-piperonyl butoxide formulations. The coefficients of variation for piperonyl butoxide ranged from 1.36 to 3.41% for the 5 samples. For pyrethrins in 3 formulations, the coefficients of variation were 2.20, 4.73, and 2.22%. An examination of the t-values indicated little or no contribution to systematic error, with the exception of one formulation. The method has been adopted official first action. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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