Riu J, Marínez E, Barceló D, Ginebreda A, Tirapu L L
Department of Environmental Chemistry, IIQAB-CSIC, Barcelona, Spain.
Fresenius J Anal Chem. 2001 Oct;371(4):448-55. doi: 10.1007/s002160101052.
Linear alkylbenzene sulfonates (LAS) have been determined in samples of the influent and the effluent, and in the sludge, from sewage-treatment plants (STP). LAS and sulfophenyl carboxylate compounds (SPC) were isolated by solid-phase extraction (SPE) with the polymeric phase Isolute ENV, then determined by liquid chromatography-electrospray mass spectrometry (LC-ESI-MS). The method enabled unequivocal identification of C10-C13 LAS by monitoring the ion at m/z 183 and the base peak corresponding to the [M-H]- ion. Average recoveries varied from 77-93% and the linear range of the method varied from 0.2 to 10 microg L(-1), with a limit of detection ranging from 10 ng L(-1) to 1.5 microg L(-1) when 200 mL waste water were preconcentrated. For sewage sludge, recoveries varied from 58 to 90% and the linear range was between 0.2 and 100 microg L(-1), with a detection limit ranging from 0.4 to 120 microg kg(-1) when 2.5 g sewage sludge was extracted. Unequivocal identification and determination of some metabolites of the LAS, the sulfophenyl carboxylate compounds (SPC), was achieved by monitoring [M-H]- ions.
已对污水处理厂（STP）进水、出水及污泥样本中的直链烷基苯磺酸盐（LAS）进行了测定。采用聚合物相Isolute ENV通过固相萃取（SPE）分离LAS和磺基苯基羧酸盐化合物（SPC），然后用液相色谱 - 电喷雾质谱法（LC - ESI - MS）进行测定。该方法通过监测质荷比为183的离子以及对应于[M - H]-离子的基峰，能够明确鉴定C10 - C13 LAS。平均回收率在77% - 93%之间，当对200 mL废水进行预浓缩时，该方法的线性范围为0.2至10 μg L(-1)，检测限在10 ng L(-1)至1.5 μg L(-1)之间。对于污水污泥，当萃取2.5 g污水污泥时，回收率在58%至90%之间，线性范围为0.2至100 μg L(-1)，检测限在0.4至120 μg kg(-1)之间。通过监测[M - H]-离子实现了对LAS的一些代谢物磺基苯基羧酸盐化合物（SPC）的明确鉴定和测定。
