Linked Life Data

19100887

Source:http://linkedlifedata.com/resource/pubmed/id/19100887

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2008-12-22
pubmed:abstractText
A highly selective sequential injection (SI) method for the automated determination of weak-acid-dissociable cyanides is reported. The analytical procedure is based on the on-line reaction of the analyte with ninhydrin in carbonate medium to form a coloured product (lambda(max)=510 nm). Cyanides are removed from sample matrix by acidification through a gas-diffusion step incorporated in the SI manifold. The effect of instrumental and chemical variables was studied. By adopting an on-line standard addition protocol, the sensitivity of the proposed method was enhanced drastically, without affecting the determination range. The assay was validated in terms of linearity (up to 200 microg L(-1)), limit of detection (c(L)=2.5 microg L(-1)), limit of quantitation (c(Q)=7.5 microg L(-1)), precision (s(r)<2.5% at 100 microg L(-1)) and selectivity. High tolerance against critical species such as sulfides and thiocyanates was achieved. The applicability of the method was demonstrated by analyzing tap and mineral water samples at levels below the limits established by international E.U. and U.S. organizations. The percent recoveries were satisfactory in all cases, ranging between 94.2 and 103.6%.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jan
pubmed:issn
1873-4324
pubmed:author
pubmed:issnType
Electronic
pubmed:day
19
pubmed:volume
632
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
93-100
pubmed:year
2009
pubmed:articleTitle
Selective determination of cyanides by gas diffusion-stopped flow-sequential injection analysis and an on-line standard addition approach.
pubmed:affiliation
Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. themelis@chem.auth.gr
pubmed:publicationType
Journal Article