Determination of 2,3,7,8-tetrachlorodibenzo-1,4-dioxin at parts per billion levels in technical-grade 2,4,5-trichlorophenoxyacetic acid, in 2,4,5-T alkyl ester and 2,4,5-T amine salt herbicide formulations by quadrupole mass fragmentography
Buser, H.R.; Bosshardt, H.P.
Journal of Chromatography 90(1): 71-77
1974
ISSN/ISBN: 0021-9673 PMID: 4824664 Document Number: 73544
A rapid, highly selective gas chromatography method is described for the determination of TCDD in 2,4,5-T as the technical product and as alkyl ester and amine formulations using quadrupole mass fragmentology. The method requires minimal or no clean-up. The content of TCDD found in batches of 2,4,5-T produced from 1967 to '73 by one manufacturer showed a sharp decrease after 1970 from 500 to 50 parts per billion (109). From summary.