Sequential injection spectrophotometric determination of orthophosphate in beverages, wastewaters and urine samples by electrogeneration of molybdenum blue using tubular flow-through electrodes

Mas-torres, Francisca; Estela, José Manuel; Miró, Manuel; Cladera, A.; Cerdà, Vı́ctor

doi:10.1016/j.aca.2003.12.051

Cited by 29 publications

(11 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spectrophotometry was the most widely used method of detection, although there were also quite a few methods that involved electrochemical detection. Almost 20% each of the listed references, described the determination of nitrite [67,96,107,118,116,117,132,131,140,155] and phosphate [52,77,107,120,119,135,134,[140][141][142]. For monitoring aquatic media, it is important not only the determination of these anions individually, but also the ratio…”

Section: Changes In Oxidation Statementioning

confidence: 99%

A review on sequential injection methods for water analysis

Mesquita

Rangel

2009

Analytica Chimica Acta

View full text Add to dashboard Cite

The development of fast, automatic and less expensive methods of analysis has always been the main aim of flow methodologies. The search for new procedures that still maintain the reliability and accuracy of the reference procedures is an ever growing challenge. New requirements are continually added to analytical methodologies, such as lower consumption of samples and reagents, miniaturisation and portability of the equipment, computer interfaces for full decision systems and so on. Therefore, the development of flow methodologies meeting the extra requirements of water analysis is a challenging work. Sequential injection analysis (SIA) presents a set of characteristics that make it highly suitable for water analysis. With sequential injection analysis, most routine determinations in waters can be performed more quickly with much lower reagent consumption when compared to reference procedures. Additionally, SIA can be a valuable tool for analyte speciation and multiparametric analysis. This paper critically reviews the overall work in this area.

show abstract

Section: Changes In Oxidation Statementioning

confidence: 99%

A review on sequential injection methods for water analysis

Mesquita

Rangel

2009

Analytica Chimica Acta

View full text Add to dashboard Cite

show abstract

“…Recovery of spiked phosphate in water, human urine, and serum samples ranged from 94.1 % to 103.4 %. Knochen (2020) specified continuous flow analysis (CFA) methods for the determination of orthophosphate indicating the mass concentration range from 0.01 mg/L to 1.00 mg/L P, and total phosphorus in the mass concentration range from 0.10 mg/L to 10.0 mg/L P. A novel and automated sequential injection procedure for spectrophotometric determination of orthophosphate without unstable chemical reducing species used in the classical molybdenum blue method was proposed by Mas-Torres et al (2004). The proposed method is linear up to 20 mg/L P and the proposed analyzer features an extremely wide dynamic range of 0.3-800 mg/L as well as improved tolerance to silicate interference.…”

Section: Introductionmentioning

confidence: 99%

Determination of phosphate in water by flow coulometry

Manová

Beinrohr

2020

Acta Chimica Slovaca

View full text Add to dashboard Cite

In this work, the possibility of flow coulometry application as coulometric titration was studied. The method was used to analyze phosphates in wastewater samples. The principle of the determination consisted in the formation of molybdophosphate and its subsequent one-electron electrolytic reduction. The present method is applicable under optimal conditions in the concentration range of 1.5 × 10−6 to 5.5 × 10−5 mol/dm3. Detection limit of the method is 3.42 × 10−7 mol/dm3. Mineralization step has been proved a problem in total phosphate content determination. If mineralization was not carried out, only inorganic soluble phosphates were determined. It is a new method characterized by its simplicity of instrumentation and handling, which is a prerequisite for its further use in the field of trace analysis.

show abstract

“…Moreover, the determination of phosphorus in surface waters can provide essential data for assessing the health of ecosystems, investigating biogeochemical processes and monitoring compliance with legislation. 1,2 For the determination of phosphate in water, the method based on the formation of molybdenum blue complex, proposed by Murphy and Riley, 3 is still the most commonly employed standard method by manual batch procedures as well as by automated instrumental systems 4 using various instrumental techniques such as spectrophotometry, [5][6][7][8][9][10][11][12][13][14] amperometry, 15 voltammetry, 16 or ion pair liquid chromatography. 17 Determination of trace elements with low atomic number such as phosphorus by X-ray fluorescence spectrometry (XRF) is hampered because of the low fluorescence yield and relatively low energy of characteristic radiation (strong absorption by the sample matrix).…”

Section: Introductionmentioning

confidence: 99%