Quantitative determination of chloride, chlorite, and chlorate ions in a mixture by successive potentiometric titrations

Tang, Tsungfei.; Gordon, Gilbert

doi:10.1021/ac50059a014

Cited by 20 publications

(14 citation statements)

References 8 publications

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“…Many methods have been proposed for the analysis of a solution of chlorine-oxygen compounds [5][6][7][8]. Total analysis methods have the major disadvantage of being time consuming, whereas the measurement of current efficiency at the beginning of the electrolysis requires very short sampling times.…”

Section: Analysis Of Solutionsmentioning

confidence: 99%

Formation of hypochlorite, chlorate and oxygen during NaCl electrolysis from alkaline solutions at an RuO2/TiO2 anode

1992

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Section: Analysis Of Solutionsmentioning

confidence: 99%

Formation of hypochlorite, chlorate and oxygen during NaCl electrolysis from alkaline solutions at an RuO2/TiO2 anode

1992

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“…According to [14], the highest rate of reaction (3) occurs when iodide ions are in excess and acidity of the solutions is high. However, under such conditions the iodide ion is easily oxidized by air oxygen and, in the case of low chlorate concentrations, the reaction time can reach 20 minutes [13].…”

Section: Resultsmentioning

confidence: 99%

“…More available are methods based on potentiometric titration. Among well-known methods is sequential potentiometric titration of hypochlorite, chlorite, and chlorate with a solution of arsenic (III) in the presence of an osmium tetroxide catalyst [13]. Such methods have a significant disadvantage, the toxicity of the titrant and the high cost of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Potentiometric Determination of Chlorate Impurities in Hypochlorite Solutions

Гиренко

Gyrenko

Николенко

2019

International Journal of Analytical Chemistry

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The method of iodometric determination of chlorates impurities in sodium hypochlorite solutions for medical and veterinary purposes was developed. This method does not require sophisticated equipment and can be implemented directly where the solutions are used. The method is based on the different rates of interaction of ClO- and ClO3- with iodide ions depending on the acidity of the medium. We have shown that blank titration is advisable to improve the accuracy of the determination of low concentrations of chlorates in the matrix of hypochlorite which is present in excess since in this case possible systematic errors due to the presence of oxidizing impurities in the reagents are prevented. To quantify the low concentrations of chlorates, we proposed to remove 85-95% of hypochlorite ions by means of reducing their excess with sodium sulfite at pH 10.5. The solution of sodium sulfite does not require standardization before each analysis in the proposed procedure. The possibility of quantitative determination of chlorate impurities in the range of 2-50 mg/L in the presence of 50-500–fold excess of sodium hypochlorite with an error of 5% has been proved. The expanded uncertainty of chlorate determination did not exceed 0.6 mg/L.

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“…The chlorine dioxide and chlorine concentrations were determined and calculated on the basis of titration results at neutral (pH = 7) and acidic (pH < 2) conditions. The sodium chloride (Aldrich, USA) consumed in the reactor was quantitatively determined argentometrically [13] against standard silver nitrate solution while chlorate concentrations were obtained iodometrically [14] against standard NTS solutions. The precision of these methods was found better than 2%.…”

Section: Methodsmentioning

confidence: 99%

Kinetics and mechanism of chloride based chlorine dioxide generation process from acidic sodium chlorate

Deshwal

Lee

2004

Journal of Hazardous Materials

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Quantitative determination of chloride, chlorite, and chlorate ions in a mixture by successive potentiometric titrations

Cited by 20 publications

References 8 publications

Formation of hypochlorite, chlorate and oxygen during NaCl electrolysis from alkaline solutions at an RuO2/TiO2 anode

Formation of hypochlorite, chlorate and oxygen during NaCl electrolysis from alkaline solutions at an RuO2/TiO2 anode

Potentiometric Determination of Chlorate Impurities in Hypochlorite Solutions

Kinetics and mechanism of chloride based chlorine dioxide generation process from acidic sodium chlorate

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