Multi-syringe flow injection system with in-line microwave digestion for the determination of phosphorus

被引：19

作者：

Almeida, MIGS

Segundo, MA

Lima, JLFC

Rangel, AOSS

机构：

[1] Univ Catolica Portuguesa, Escola Super Biotecnol, P-4200072 Porto, Portugal

[2] Univ Porto, Fac Farm, Serv Quim Fis, REQUIMTE, P-4050047 Porto, Portugal

来源：

TALANTA | 2004年 / 64卷 / 05期

关键词：

multi-syringe flow analysis; total phosphorus; microwave; in-line digestion; waste waters;

D O I：

10.1016/j.talanta.2004.04.006

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A multi-syringe system for spectrophotometric determination of total phosphorus involving in-line digestion is proposed. Sample and digestion solution were dispensed and directed towards a digestion vessel located inside a domestic microwave oven (MWO) where sample digestion took place. Afterwards, the digested sample was merged with the necessary reagents for the colorimetric determination based on the molybdenum blue method. Several digestion conditions were studied regarding composition of digestion solution, digestion time and power set on the MWO. The system was applied to waste water samples and results shown a good agreement with the reference method. Repeatable results (R.S.D. < 2.41%) and determination frequency of 12h(-1) were obtained. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1283 / 1289

页数：7

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