TY - JOUR
T1 - Selective Determination of Free Cyanide in Environmental Water Matrices by Ion Chromatography with Suppressed Conductivity Detection
AU - Destanoʇlu, Orhan
AU - Yilmaz, Gülçin Gümüş
AU - Apak, Reşat
N1 - Publisher Copyright:
© 2015 Copyright © Taylor & Francis Group, LLC.
PY - 2015/10/2
Y1 - 2015/10/2
N2 - The study was aimed at developing suitable chromatographic conditions and pretreatment methods for reliable trace analysis of cyanide in drinking water and seawater. Separation of CN- (as CNO-), F-, Cl-, Br-, and was carried on a Dionex IonPac AS20 column. Two different methods were developed for different samples. LOD and LOQ values were 7.2 g L-1 and 24.0 g L-1 for Method I and were 15.4 g L-1 and 51.3 g L-1 for Method II, respectively. Our results did not indicate the presence of cyanide in drinking water samples commercially supplied from Istanbul markets. By the addition of 250, 500, and 1000 g L-1 to drinking water, cyanide recoveries were found 100.1%, 104.5%, and 106.9%, respectively, by employing Method I. Method II was applied to an artificial and real seawater sample obtained from the Marmara Sea, Istanbul, where a 50 g L-1 cyanide spike gave a recovery of 100.1%. Interferences from excessive amounts of salts in seawater were removed by using strongly acidic cation-exchange resin and melamine-formaldehyde resin. The proposed pre-Treatment Method (II) and chromatographic conditions provided low LODs for cyanide in seawater (well below acute toxicity limits), as dilution errors and matrix effects were eliminated.
AB - The study was aimed at developing suitable chromatographic conditions and pretreatment methods for reliable trace analysis of cyanide in drinking water and seawater. Separation of CN- (as CNO-), F-, Cl-, Br-, and was carried on a Dionex IonPac AS20 column. Two different methods were developed for different samples. LOD and LOQ values were 7.2 g L-1 and 24.0 g L-1 for Method I and were 15.4 g L-1 and 51.3 g L-1 for Method II, respectively. Our results did not indicate the presence of cyanide in drinking water samples commercially supplied from Istanbul markets. By the addition of 250, 500, and 1000 g L-1 to drinking water, cyanide recoveries were found 100.1%, 104.5%, and 106.9%, respectively, by employing Method I. Method II was applied to an artificial and real seawater sample obtained from the Marmara Sea, Istanbul, where a 50 g L-1 cyanide spike gave a recovery of 100.1%. Interferences from excessive amounts of salts in seawater were removed by using strongly acidic cation-exchange resin and melamine-formaldehyde resin. The proposed pre-Treatment Method (II) and chromatographic conditions provided low LODs for cyanide in seawater (well below acute toxicity limits), as dilution errors and matrix effects were eliminated.
KW - cyanide
KW - determination
KW - drinking water
KW - ionchromatography
KW - melamine-formaldehyderesin
KW - seawater
UR - http://www.scopus.com/inward/record.url?scp=84942778991&partnerID=8YFLogxK
U2 - 10.1080/10826076.2015.1076460
DO - 10.1080/10826076.2015.1076460
M3 - Article
AN - SCOPUS:84942778991
SN - 1082-6076
VL - 38
SP - 1537
EP - 1545
JO - Journal of Liquid Chromatography and Related Technologies
JF - Journal of Liquid Chromatography and Related Technologies
IS - 16
ER -