Determination of terbacil residues using microcoulometric gas chromatography

Pease, Harlan L.

doi:10.1021/jf60155a018

Cited by 35 publications

(20 citation statements)

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“…Simazine and terbacil were extracted following the procedures of Young & Chu (1973) and Pease (1968), respectively. Analysis employed a Micro-Tek 220 gas chromatograph equipped with a "Ni electron capture detector operated in the pulse mode.…”

Section: Field Persistence Studymentioning

confidence: 99%

The comparative behaviour of simazine and terbacil in soils

Jensen

Kimball

1982

Weed Research

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Summary Adsorption of simazine (2‐chloro‐4,6‐bisethyl‐amino‐1,3,5‐triazine) was 2.2–4 times greater than that of terbacil (5‐chloro‐6‐methyl‐3‐t‐butyl‐uracil) in the same soils and adsorption of both herbicides was 2–4 times greater in the topsoils than subsoils. Adsorption was inversely correlated with herbicide movement in a thick‐layer chromatography system. One year after application of 3 kg/ha to field plots, simazine residues were highest near the soil surface, whereas terbacil residues increased with soil depth in the sandy and sandy loam soils. Total residues recovered from the upper 25 cm of soils was 5% or less of the simazine originally applied, and 10% or less of the applied terbacil. In an oat seedling bio‐assay, the GR50 values were generally 1.5–3 times higher for simazine than for terbacil in the same soils.

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Section: Field Persistence Studymentioning

confidence: 99%

The comparative behaviour of simazine and terbacil in soils

Jensen

Kimball

1982

Weed Research

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“…Extraction of terbacil residues from plant tissue has generally involved aqueous sodium hydroxide solution (Pease 1968;Wheeler et al19l1;Cessna 19ll;Polzhofer 1978) or organic solvents such as methanol (Rhodes 1911Weierich et al 1977 Monaco 1983a, b). ethyl acetate (Gutenmann and Lisk 1968), acetone (Lawrence 1976) and chloroform (Holt and Pease 1977 (Fig.…”

Section: Resultsmentioning

confidence: 99%

The determination of the herbicide terbacil in asparagus spears by gas chromatography

Cessna¹

1991

Can. J. Plant Sci.

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Cessna, A. J. 1991. The determination of the herbicide terbacil in asparagus spears by gas chromatography. Can. J. Plant Sci. 71: 915 921. In aT-yr study, asparagus spears from established plantings at two sites in British Columbia and one site in Ontario were analyzed for terbacil residues following preemergence and early postemergence applications of terbacil at 0.6, 1.1 and2.2 kg ha-'. Gas chromatographic determination of terbacil residues using N-specific alkali flame ionization detection indicatedlh;t at one site, maximum terbacil residues in the preemergence samples were 14 + 3 pg kg ' for the 2.2 kg ha I application rate, whereas maximum residues in the early postemergence samples for the 2.2 kE ha-r apptication rate were 493 + 250 pg kg-l at a second site. Recoveries For personal use only.

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“…So far it has only been used on a limited scale for herbicide residue analysis. The values published for linuron, diuron (Belasco & Pease, 1969), bromacil (Pease, 1966), terbacil (Pease, 1968), and propanil analysed in soil samples were between 0-04 and 0-1 ppm, being approximately in the order of electron capture detection. With this technique, however, there is less interference from coextracted material.…”

Section: (B) Coutson Etectrolytic Condtictivity Detector (Ccd)mentioning

confidence: 92%