Triethanolamine-based esterquat in sediments: New analytical method, environmental occurrence, and homologue
Sakura Yoshii1, Daisuke Nakajima1, Naoki Saito1
1Health and Environmental Risk Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
Chemosphere
|June 1, 2024
Summary
Triethanolamine-based esterquat (TEAQ), a fabric softener ingredient, was quantified in Japanese sediments. TEAQ contamination was found in most samples, highlighting the need for environmental risk assessment of esterquats.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
- Environmental Science
Background:
- Triethanolamine-based esterquat (TEAQ) is a key component in fabric softeners, used extensively worldwide.
- Limited data exists on the environmental presence of TEAQ, especially in aquatic sediments.
Purpose of the Study:
- To develop a robust analytical method for quantifying TEAQ in environmental sediment samples.
- To investigate the occurrence and levels of TEAQ contamination in Japanese river and lake sediments.
Main Methods:
- Development of a liquid chromatography-tandem mass spectrometry method utilizing a polymer-based size-exclusion column for TEAQ analysis.
- Quantification of TEAQ monoesters and diesters in sediment samples, with established method detection limits.
- Analysis of TEAQ concentrations in 26 Japanese river and lake sediment samples and 14 commercial fabric softener products.
Main Results:
- TEAQ was detected in 22 out of 26 sediment samples, with concentrations reaching up to 1340 μg/kg-dry.
- Sediment TEAQ levels correlated positively with benzalkonium concentrations and organic carbon content.
- TEAQ was present in 8 out of 14 fabric softeners, ranging from 1.7-7.4 wt%.
Conclusions:
- The developed analytical method is effective for TEAQ quantification in sediments.
- TEAQ is a widespread contaminant in Japanese river and lake sediments.
- Findings provide crucial data for the environmental risk assessment of esterquats.
Keywords:
Benzalkonium chlorideCommercial fabric softenerFatty acidLC-MS/MSQuaternary ammonium compoundMore Related Videos
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