Linked Life Data

19477066

Source:http://linkedlifedata.com/resource/pubmed/id/19477066

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2009-7-28
pubmed:abstractText
Novel, sensitive and rapid spectrophotometric methods, using phenoxazine (PNZ), 2-chlorophe-noxazine (CPN) and 2-trifluoromethylphenoxazine (TPN) as chromogenic reagents for the determination of residual chlorine are proposed. The methods are based on the reduction of chlorine by an electrophilic coupling reagent, 3-methyl-2-benzothiazoline hydrazono hydrochloride hydrate (MBTH) in mild hydrochloric acid medium and subsequent coupling with PNZ, CPN or TPN. The blue color formed in the reaction showed maximum absorbance at 680-690 nm and obeyed Beer's law over the range 0.1-2.2 microg ml(-1). The molar absorptivity values with PNZ, CPN and TPN were 2.80 x 10(4), 2.67 x 10(4) and 1.91 x 10(4) l mol(-1)cm(-1) and Sandell's sensitivity values were 0.028, 0.027 and 0.028 microg cm(-2) respectively. The proposed methods were successfully applied in the determination of residual chlorine in drinking water and environmental water samples. The performance of proposed methods was evaluated in terms of Student's t-test and variance ratio F-test which indicated the significance of proposed methods over the standard spectrophotometric method.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1873-3336
pubmed:author
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
170
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
292-7
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Novel oxidative electrophilic coupling reactions of phenoxazine derivatives with MBTH and their applications to spectrophotometric determination of residual chlorine in drinking water and environmental water samples.
pubmed:affiliation
Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
pubmed:publicationType
Journal Article