Separation, Detection, and Functional Materials. Determination of residual chlorine by flow injection/electrochemical detector.

Iketake, Hideto; Yamada, Akifumi

doi:10.2116/bunsekikagaku.48.1123

Cited by 13 publications

(5 citation statements)

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“…1 The determination of hypochlorite is industrially important in connection with water analysis. 2 Hypochlorite is inherently an unstable compound.…”

Section: Introductionmentioning

confidence: 99%

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A facile spectrophotometric method for the determination of hypochlorite using rhodamine B

Pasha

Narayana

2007

J. Braz. Chem. Soc.

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Um método espectrofotométrico simples, rápido e sensível foi desenvolvido para a determinação de hipoclorito usando Rodamina B. O método proposto considera a reação de hipoclorito com iodeto de potássio em meio ácido, com liberação de iodo. O iodo liberado descora a solução vermelho-rosada de Rodamina B que pode ser medida em 553 nm. Este decréscimo na absorbância é diretamente proporcional à concentração de hipoclorito e obedece a lei de Beer no intervalo de 0,1 a 4,0 μg mL -1 de hipoclorito. A absortividade molar, sensitividade de Sandell, limite de detecção e de quantificação do método são 2,57×10 5 L mol -1 cm -1 , 2,01×10 -3 μg cm -2 , 0,070 μg mL -1 e 0,212 μg mL -1 , respectivamente. As condições ótimas de reação e outros parâmetros analíticos foram avaliados. O efeito dos íons interferentes na determinação é descrito. O método proposto foi aplicado com sucesso na determinação de hipoclorito em várias amostras de água de torneira, água mineral e leite.A simple, rapid and sensitive spectrophotometric method has been developed for the determination of hypochlorite using Rhodamine B. The proposed method reports the reaction of hypochlorite with potassium iodide in an acid medium with iodine liberation. The liberated iodine bleaches the pinkish red color of the Rhodamine B and can be measured at 553 nm. This decrease in absorbance is directly proportional to the hypochlorite concentration and obeys Beer's law in the range of 0.1 -4.0 μg mL -1 of hypochlorite. The molar absorptivity, Sandell's sensitivity, detection limit and quantitation limit of the method were found to be 2.57×10 5 L mol -1 cm -1 , 2.01×10 -3 μg cm -2 , 0.070 μg mL -1 and 0.212 μg mL -1 respectively. The optimum reaction conditions and other analytical parameters were evaluated. The effect of interfering ions on the determination is described. The proposed method has been successfully applied to the determination of the hypochlorite in various samples of tap water, natural water and milk.Keywords: hypochlorite determination, spectrophotometry, Rhodamine B IntroductionHypochlorite is very high tonnage chemical for sanitizing and bleaching purposes. 1 The determination of hypochlorite is industrially important in connection with water analysis. 2 Hypochlorite is inherently an unstable compound. Hypochlorite is widely used in textile industry as a bleaching agent 3 and disinfectant in fabrics, wood pulp food and milk 4 industries. A medical application of the compound is in the treatment of skin cancer. 5 Another application of the chemical has been a valuable tool for the narcotics department as it could be applied to track the banned drugs like cocaine. 6 Sodium hypochlorite is used as a screening agent 6 for the identification of cocaine.The lethal action of calcium hypochlorite on Bacillus anthracoides spores 7 appeared to result from alteration of the structural organization of the spores which led to disturbance of the normal permeability barrier with loss of life -sustaining components and unbalance of metabolic process. It is also used...

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“…1 The determination of hypochlorite is industrially important in connection with water analysis. 2 Hypochlorite is inherently an unstable compound.…”

Section: Introductionmentioning

confidence: 99%

“…1 The determination of hypochlorite is industrially important in connection with water analysis. 2 Hypochlorite is inherently an unstable compound. Hypochlorite is widely used in textile industry as a bleaching agent 3 and disinfectant in fabrics, wood pulp food and milk 4 industries.…”

Section: Introductionmentioning

confidence: 99%

A facile spectrophotometric method for the determination of hypochlorite using rhodamine B

Pasha

Narayana

2007

J. Braz. Chem. Soc.

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“…Then, the improvement of the signal reproducibility, rapidity for the measurement and sample handling in the determination of residual chlorine have been achieved by flow injection analysis (FIA) coupled with amperometric detection. [3][4][5] Chlorine usually dissipates from the water sample very quickly as a result of exposure to light, increased temperature, and agitation. A laboratory analysis is not recommended for the determination real samples due to the short storage time for stable sample preservation.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized FIA System for the Determination of Residual Chlorine in Environmental Water Samples

et al. 2004

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“…This method was compared with an iodometric method. In a similar study, HOCl was determined using cylic voltammetry for measurement of residual levels in tap water; the reaction was monitored via a reduction path at + 0.3 V versus SCE [25]. In this study, gold electrode was applied to the flow injection analysis device and the linear calibration concentration range was found to be 0.05 -2.5 mg L -1 while the relative standard deviation was 2.1 %.…”

Section: Electrochemistrymentioning

confidence: 84%

Hypochlorous Acid - Analytical Methods and Antimicrobial Activity

Eryılmaz¹,

Palabiyik²

2013

Trop. J. Pharm Res

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Separation, Detection, and Functional Materials. Determination of residual chlorine by flow injection/electrochemical detector.

Cited by 13 publications

References 0 publications

A facile spectrophotometric method for the determination of hypochlorite using rhodamine B

A facile spectrophotometric method for the determination of hypochlorite using rhodamine B

A Miniaturized FIA System for the Determination of Residual Chlorine in Environmental Water Samples

Hypochlorous Acid - Analytical Methods and Antimicrobial Activity

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