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METHODS AND OBJECTS OF CHEMICAL ANALYSIS
An international journal devoted to all aspects of analytical chemistry ISSN 2413-6166 (Online), ISSN 1991-0290 (Print) |
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Indirect Determination of Phosphate-ions in Waters with the Reagent Sulfonitrazo DAF |
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* Corresponding author
† Mykolayiv National Agrarian University, Georgy Gongadze Str., 9, 54020, Ukraine; *e-mail: kelinas@ukr.net |
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Methods Objects Chem. Anal., 2021, 16(3), p. 147-152 |
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Buy Article: 5 EUR plus tax |
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Abstract
An indirect method for the determination of phosphate ions in natural and treated wastewater is proposed, which is based on the formation of molybdophosphate complex (MFC), separating it from excess unbound molybdate by isoamyl acetate extraction, extraction of MFC into weakly alkaline aqueous phase, destruction of MFC and photometric determination of the equivalent amount of molybdate ions with the sulfonitrazo DAF reagent. The technique allows to determine from 0.02 to 0.43 mg dm-3 of phosphate ion (in terms of phosphorus).
Received: April 27, 2021; Accepted: July 29, 2021; Published online: October 05, 2021
Keywords: orthophosphate ions, molybdophosphate complex, spectrophotometry, DAF sulfonitrazo reagent, natural and wastewater
Article language: Ukr.
Publisher: Taras Shevchenko National University, Kiev Ukraine
(Analytical chemistry department at Taras Shevchenko
National University, 64 Vladimirskaya STR., Kiev, 01601 UKRAINE)
analysis@univ.kiev.ua,
www.univ.kiev.ua,
+380 (44) 2393444
The journal is indexed in SCOPUS and Web of Science
The journal website: www.moca.net.ua
The articles in this journal are licensed under
CC BY 4.0
