Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559900 | Talanta | 2011 | 6 Pages |
Abstract
A simple and fast reaction between 12-molybdophosphate heteropoly anion and the polymethine dye Astra Phloxine was used for the development of a new SIA method for the determination of orthophosphate. The suggested method has higher sensitivity and a broader calibration range than existing SIA methods. It can be used to detect phosphate in the range from 0.2 to 10 μmol Lâ1 with a detection limit of 0.1 μmol Lâ1 and an acceptable throughput of 20 samples hâ1. The comparably low molybdate (5.6 mmol Lâ1) and dye (0.1 mmol Lâ1) concentrations led to an improvement in the stability of the base line. Inter-day reproducibility was better than 5%, while the intra-day RSD was in the range 0.8-3.5%. The method was used for the analysis of natural water samples and phosphorus-containing chemicals having a low content of orthophosphate.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Svitlana V. Khlyntseva, Andriy B. Vishnikin, Mohammed K.E.A. Al-Shwaiyat, Hana SklenáÅová, Petr Solich, Yaroslav R. Bazel, Vasil Andruch,