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[Analysis of Dieldrin and DTTB in Textiles].
Iwaki Nishi1, Manabu Sato1, Fumi Nakano1
1Kanagawa Prefectural Institute of Public Health.
Summary
This study presents a safer, improved analytical method for detecting dieldrin and 4,6-dichloro-7-(2,4,5-trichlorophenoxy)-2-trifluoromethylbenzimidazole (DTTB) in textiles using GC-MS. The new method replaces hazardous reagents and achieves high accuracy, ensuring compliance with Japanese regulations.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Textile Science
Background:
- Japanese regulations restrict harmful substances in textiles, including dieldrin and DTTB.
- Existing analytical methods are over 30 years old and use hazardous reagents like dimethyl sulfate.
- There is a need for improved, safer analytical techniques for textile safety compliance.
Purpose of the Study:
- To develop an improved, safer analytical method for the simultaneous detection of dieldrin and DTTB in textiles.
- To replace hazardous derivatization reagents with safer alternatives.
- To ensure the developed method meets Japanese regulatory standards for harmful substances.
Main Methods:
- Gas chromatography-mass spectrometry (GC-MS) was employed for simultaneous analysis.
- Phenyltrimethylammonium hydroxide was used as a safer alternative reagent for DTTB derivatization.
- Extraction was performed using hydrochloric acid and methanol, followed by purification with a Bond Elut PRS column.
Main Results:
- The developed method demonstrated high linearity and accuracy for both dieldrin and DTTB.
- Recovery rates ranged from 94-104% with relative standard deviations below 7%.
- Limits of quantitation (dieldrin: 1.3 μg/g, DTTB: 0.72 μg/g) were well below the Japanese regulatory limit of 30 μg/g.
Conclusions:
- The improved GC-MS method offers a safer and effective approach for detecting dieldrin and DTTB in textiles.
- This method provides accurate and reliable results, facilitating compliance with Japanese household product safety laws.
- The study successfully replaced a carcinogenic reagent with a safer alternative, enhancing laboratory safety and analytical efficiency.
