Use of column-switching ion chromatography for the simultaneous determination of total nitrogen and phosphorus after microwave assisted persulphate digestion

被引：14

作者：

Colombini, S ^{[1
]}

Polesello, S ^{[1
]}

Valsecchi, S ^{[1
]}

机构：

[1] CNR, IRSA, I-20047 Brugherio, MI, Italy

来源：

JOURNAL OF CHROMATOGRAPHY A | 1998年 / 822卷 / 01期

关键词：

persulphate digestion; microwave-assisted; water analysis; nitrogen; phosphorus;

D O I：

10.1016/S0021-9673(98)00569-X

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A method for the simultaneous determination of total nitrogen and total phosphorus in environmental and waste waters is proposed. Samples were digested by alkaline persulphate solution in a microwave oven and the resulting solutions were analysed by ion chromatography without any sample pretreatment. The excess of sulphate (4.5 g l(-1)), generated from the digested persulphate, was eliminated by a column switching technique applied to a system composed of two serially connected columns. The detection system showed good reproducibility and accuracy in the typical concentration range used for wastewater. The limits of quantification were 9.0 mu equiv.l(-1) (0.12 mg N l(-1)) for total nitrogen and 3.3 mu equiv.l(-1) (0.10 mg P l(-1)) for total phosphorus. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：162 / 166

页数：5

共 15 条

[1] Use of factorial experimental design for the rapid evaluation of main and interactive factors affecting linearity in calibration curves for sulfate analysis by ion chromatography [J].