Blank problems in trace analysis of diethylhexyl and dibutyl phthalate: Investigation of the sources, tips and tricks

被引：136

作者：

Fankhauser-Noti, Anja ^{[1
]}

Grob, Koni ^{[1
]}

机构：

[1] Official Food Control Author Canton Zurich, CH-8032 Zurich, Switzerland

来源：

ANALYTICA CHIMICA ACTA | 2007年 / 582卷 / 02期

关键词：

phthalates; di(2-ethylhexyl)phthalate; dibutyl phthalate; blank problem; absorption from the air; aluminium oxide for cleaning solvent;

D O I：

10.1016/j.aca.2006.09.012

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The analysis of phthalates, particularly that of di(2-ethylhexyl)phthalate (DEHP) and dibutyl phthalate (DBP), is notorious for blank problems. Methods and tools are listed to identify the sources and reduce the system contamination to below 1 pg DEHP and DBP or below 1 ng mL(-1) of sample solution. Once direct contact with phthalate-containing plastic articles is ruled out, the air is the major source, primarily via absorption to the surfaces of laboratory glass ware. A main improvement was achieved by cleaning solvents with aluminium oxide permanently left in the reservoirs. The data enables to estimate the contamination to be expected and to design methods keeping blanks below a critical threshold. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：353 / 360

页数：8

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