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Triethanolamine-based esterquat in sediments: New analytical method, environmental occurrence, and homologue composition
Chemosphere ( IF 8.1 ) Pub Date : 2024-05-30 , DOI: 10.1016/j.chemosphere.2024.142495
Sakura Yoshii 1 , Daisuke Nakajima 1 , Naoki Saito 1 , Masanori Terasaki 2 , Satoshi Endo 1
Affiliation  

The cationic surfactant triethanolamine-based esterquat (TEAQ) is a main ingredient in commercial fabric softeners and is produced and used in large quantities. However, little information is available for its occurrence in the environment, particularly in sediments. Here, we developed an analytical method for quantifying TEAQ in sediment and investigated TEAQ contamination in Japanese river and lake sediments. In our analytical method, TEAQ concentrations were measured by liquid chromatography–tandem mass spectrometry using a polymer-based size-exclusion column, which resulted in excellent peak shapes. TEAQ was detected at significant levels in procedural blanks, resulting in a method limit of detection in the sediment of 8.9–97 μg/kg-dry for TEAQ monoesters and 0.6–24 μg/kg-dry for TEAQ diesters. TEAQ was detected in 22 out of 26 sediment samples, with the sum of all homologue concentrations being up to 1340 μg/kg-dry. The concentration of TEAQ in sediments was high at locations where the concentrations of benzalkoniums and the organic carbon content were also high. TEAQ was detected in 8 out of 14 commercial fabric softeners at concentrations of 1.7–7.4 wt%. TEAQ homologues containing only saturated fatty acids accounted for 83 ± 5% of the total TEAQ in the sediments, whereas those with unsaturated fatty acids accounted for 71 ± 14% of the total TEAQ in a commercial technical mixture and the softener products. The results of this study will be useful for the environmental risk assessment of esterquats.

中文翻译:


沉积物中基于三乙醇胺的酯季铵盐:新的分析方法、环境发生情况和同系物组成



阳离子表面活性剂三乙醇胺基酯季铵盐(TEAQ)是商业织物柔软剂的主要成分,并且被大量生产和使用。然而,关于其在环境中,特别是在沉积物中的发生情况的信息很少。在这里,我们开发了一种定量沉积物中 TEAQ 的分析方法,并调查了日本河流和湖泊沉积物中的 TEAQ 污染。在我们的分析方法中,TEAQ 浓度是通过液相色谱-串联质谱法使用基于聚合物的尺寸排阻柱测量的,从而产生了出色的峰形。在程序空白中检测到显着水平的 TEAQ,导致沉积物中 TEAQ 单酯的方法检出限为 8.9–97 μg/kg(干),TEAQ 二酯为 0.6–24 μg/kg(干)。在 26 个沉积物样品中的 22 个中检测到 TEAQ,所有同系物浓度总和高达 1340 μg/kg(干)。在苯扎氯铵浓度和有机碳含量也较高的地方,沉积物中 TEAQ 的浓度也较高。 14 种商用织物软化剂中有 8 种检测到 TEAQ,浓度为 1.7–7.4 wt%。仅含有饱和脂肪酸的 TEAQ 同系物占沉积物中总 TEAQ 的 83 ± 5%,而含有不饱和脂肪酸的 TEAQ 同系物占商业技术混合物和软化剂产品中总 TEAQ 的 71 ± 14%。本研究结果将有助于酯季铵盐的环境风险评估。
更新日期:2024-05-30
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