Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorJaroon Junsomboonen_US
dc.contributor.authorJaroon Jakmuneeen_US
dc.description.abstract© 2020, Chiang Mai University. All rights reserved. A new extraction procedure employing an off-line extraction column was proposed for the extraction of water soluble chromium(VI) from Portland cement products. A plastic syringe was used as a column by fitting at the bottom with cotton wool and a piece of filter paper to support a cement sample. Deionized water was used to extract the sample under gravity flow, and the eluate was collected for further differential pulse voltammetric (DPV) determination of Cr(VI) in the extract. The extracted solution was placed in a voltammetric cell, added with ammonium tartrate electrolyte solution (0.1 M, pH 9.0), stirred at 2000 rpm, and purged with nitrogen gas for 3 min. Then, the DPV waveform was cathodically scanned to a hanging mercury drop electrode (HMDE) from 0.0 to-0.32 V versus Ag/ AgCl reference electrode and a voltammogram was recorded. Peak current of Cr(VI) reduction was measured at a peak potential of-0.16 V. Relative standard deviation for 10 replicate determinations of 100 µg/L of Cr(VI) was 0.87%. Percentage recovery obtained by spiking 40 µg/L Cr(VI) to the sample solution was found to be 98%, and a detection limit of 2 µg/L was achieved. The developed method was applied to the analysis of Portland cement samples by using standard addition procedure. The water soluble Cr(VI) contents in cement which obtained from the column extraction procedure were well correlated with those obtained by the steady state extraction procedure, but it showed slightly higher extraction efficiency.en_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.subjectMaterials Scienceen_US
dc.subjectPhysics and Astronomyen_US
dc.titleNew extraction procedure and differential pulse voltammetric method for determination of water soluble chromium(VI) content in portland cement productsen_US
article.title.sourcetitleChiang Mai Journal of Scienceen_US
article.volume47en_US Mai Universityen_US
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.

Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.