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dc.contributor.authorShahram. Nekouei"en_US
dc.contributor.authorFarzin.Nekoueien_US
dc.date.accessioned2019-09-17T08:55:04Z-
dc.date.available2019-09-17T08:55:04Z-
dc.date.issued2015en_US
dc.identifier.citationChiang Mai Journal of Science 42, 2 (April 2015), 417 - 428en_US
dc.identifier.issn0125-2526en_US
dc.identifier.urihttp://it.science.cmu.ac.th/ejournal/dl.php?journal_id=5763en_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/66809-
dc.description.abstractIn the present work, determination of trace manganese in water samples from rivers located in industrial and nonindustrial areas by the simultaneous cloud-point extraction (CPE) and spectrophotometric methods in ternary ion association system was developed. In the proposed method, amphoteric substance of CHAPSO was applied as chelating agent. For this mixed-micelle mediated extraction, CHAPSO, amaranth, triton X-114, trioctylamine (TOA) and NaCl were applied as chelating agent, auxiliary ligand, extraction agent, ion pairing reagent and auxiliary ligand and co-extraction agent, respectively. The various effective parameters on CPE including, pH, type of surfactants and electrolytes, concentration of chelating agent, surfactant, ion pairing reagent (TOA), electrolyte, temperature and duration were investigated. A linear calibration curve in the range of 5-700 µg L-1 was acquired. Under the optimized conditions, the limit of detection (LOD) was 1.05 µg L-1and the relative standard deviation (RSD) for 50 and 500 µg L-1 were 1.43 and 2.71, respectively (n = 10). The regression equation was acquired by the least square method is A = 2.63 ×10-3CMn + 1.67 ×10-2 with a correlation coefficient of 0.9989 (n = 12), where A is the absorbance and CMn shows the concentration of Mn2+ in µg L-1.It is for the first time use of an amphoteric ligand in the field of cloud point extraction and never has been used before that. Considering the achieved results, the manganese quantities, in water samples from the rivers located in industrial areas is considerably higher than the nonindustrial one.en_US
dc.language.isoEngen_US
dc.publisherScience Faculty of Chiang Mai Universityen_US
dc.subjectManganese (II)en_US
dc.subjectAmaranthen_US
dc.subjectCloud point extractionen_US
dc.subjectTOAen_US
dc.subjectTriton X-114en_US
dc.subjectWater samplesen_US
dc.titleApplication of Cloud Point Extraction for the Determination of Manganese (II) in Water Samplesen_US
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