Determination of sulphide in liquid and solid samples by integrated pervaporation–potentiometric detection

A selective dynamic method for the determination of sulphide in liquid and solid samples based on the integration of hydrogen sulphide pervaporation and potentiometric monitoring of the sulphide in a laboratory-made module has been developed. The analyte was converted into hydrogen sulphide by react...

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Bibliographic Details
Published in:Analytica chimica acta 2001-06, Vol.436 (2), p.301-307
Main Authors: Vallejo, B, Richter, P, Toral, I, Tapia, C, Luque de Castro, M.D
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chemistry
Electrochemical methods
Exact sciences and technology
Global environmental pollution
Pervaporation
Pollution
Selective electrode
Sulphide
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Summary:A selective dynamic method for the determination of sulphide in liquid and solid samples based on the integration of hydrogen sulphide pervaporation and potentiometric monitoring of the sulphide in a laboratory-made module has been developed. The analyte was converted into hydrogen sulphide by reaction with an acidic donor stream and accepted into a dilute NaOH solution after pervaporation. The method proposed has a determination range between 0.1–30 μg ml −1 and 0.3–50 μg g −1 for liquid and solid samples, respectively, a precision (expressed as relative standard deviation) of 3.1 and 4.3%, respectively, and has been applied to a sulphide quality control standard containing a certified concentration of 10.10 μg ml −1 with excellent results.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(01)00949-7