Analysis of a Moth-proofing Agent, Dieldrin, in Wool Fabrics

Kaniwa, Masa-aki; MOHRI, JUNKO; KOJIMA, SHIGEO; Nakamura, Akitada; Oba, Takuma

doi:10.1248/jhs1956.23.7

Cited by 1 publication

(2 citation statements)

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“…Kaniwa et al [1] spiked wool with dieldrin and found that the amount of dieldrin recovered depended on the solvent. Dieldrin was easily recovered from wool that had been permeated with dieldrin in organic solvents such as acetone and from wool that had been treated with dry dieldrin, but it was not easily recovered from wool that had been treated with a dieldrin chemical agent (Dielmoth XC-E3.H/C, Kaken Kogyo, Osaka, Japan).…”

Section: Resultsmentioning

confidence: 99%

“…Dieldrin has been generally determined by GC. The Japanese official method of determination of dieldrin in wool products is based on the method of Kaniwa et al [1]. The official method has two procedures (extraction by reflux and purification by column chromatography) and consumes about 1 L of organic solvent, including washing implements, per sample.…”

Section: Introductionmentioning

confidence: 99%

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Determination of dieldrin in wool products by gas chromatography with microwave-assisted extraction

Ohto¹,

Kodama

Saitō

et al. 2006

J. Sep. Sci.

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Dieldrin is a moth-proofing agent that was banned by the Stockholm Convention in 2001. The amount of dieldrin in wool products was measured by a microwave-assisted extraction (MAE) method. The optimal conditions were as follows: extraction solvent, acetone/n-hexane (1:1 v/v); extraction temperature, 110 degrees C; extraction time, 10 min; solvent volume, 25 mL. When six samples were used, dieldrin contents determined by GC with the proposed MAE agreed closely with those by the Japanese official method using GC with solvent extraction and cleanup by column chromatography. The proposed MAE has two merits. First, the pretreatment of the MAE needs only 4 h for 11 samples, while that using the Japanese official method needs 2 days for six samples. Second, the volume of organic solvents used for the proposed method was only about one-tenth of that used in the Japanese official method. Our proposed method seems to be easy and useful for daily (routine) tests. Dieldrin contents of 28 used wool products, which were obtained from local clothing shops and ordinary homes, were determined by GC with the proposed MAE, and six products contained dieldrin (0.310-175 ppm). The dry cleaning of the woolen yarn containing 175 ppm dieldrin did not remove a significant amount of dieldrin. Therefore, it seems likely that dieldrin is still distributed slightly but widely throughout the world.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%