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Article: Separation and determination of metal cations in milk and dairy products by CE

TitleSeparation and determination of metal cations in milk and dairy products by CE
Authors
KeywordsCation analysis
CE
Food analysis
Metal analysis
Milk
Issue Date2007
PublisherWiley - V C H Verlag GmbH & Co KGaA.
Citation
Electrophoresis, 2007, v. 28 n. 22, p. 4156-4163 How to Cite?
AbstractTo prevent casein adsorption and improve between-run repeatability, a CE procedure is developed for cation analysis in milk using a modified imidazole/α-hydroxyisobutyric acid (HIBA) BGE system to operate at pH 6 to match the pH of milk and elevate imidazole concentration to enhance its buffer action. The procedure is shown to produce a fast, economic and efficient method for cation separation in milk with only simple dilution. Upon direct hydrodynamic injection of diluted milk sample at 8 cm for 30 s in an uncoated column with a BGE consisting of 10 mM imidazole, 10 mM HIBA and 10% methanol at pH 6.0 under +18 W, baseline separation was achieved for K+, Na+, Ca2+, Mg2+, Mn2+, Cd2+, Co2+, Ni2+ and Zn2+. Agreeable results at 95% confidence level were obtained using CE and inductively coupled plasma-atomic emission spectrometry (ICP-AES) for milk samples after protein removal. Baseline-resolved peaks for essential minerals were obtained for fresh and non-refrigerated reconstituted milks. Long-term stability was demonstrated by repeated determinations without rinsing and improvement in repeatability was shown by rinsing with 60 mM SDS in BGF. Information on metal speciation useful for nutritional assessment was obtained from CE to complement the ICP methods. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Persistent Identifierhttp://hdl.handle.net/10722/70199
ISSN
2015 Impact Factor: 2.482
2015 SCImago Journal Rankings: 0.896
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSze, KLen_HK
dc.contributor.authorYeung, WSBen_HK
dc.contributor.authorFung, YSen_HK
dc.date.accessioned2010-09-06T06:20:39Z-
dc.date.available2010-09-06T06:20:39Z-
dc.date.issued2007en_HK
dc.identifier.citationElectrophoresis, 2007, v. 28 n. 22, p. 4156-4163en_HK
dc.identifier.issn0173-0835en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70199-
dc.description.abstractTo prevent casein adsorption and improve between-run repeatability, a CE procedure is developed for cation analysis in milk using a modified imidazole/α-hydroxyisobutyric acid (HIBA) BGE system to operate at pH 6 to match the pH of milk and elevate imidazole concentration to enhance its buffer action. The procedure is shown to produce a fast, economic and efficient method for cation separation in milk with only simple dilution. Upon direct hydrodynamic injection of diluted milk sample at 8 cm for 30 s in an uncoated column with a BGE consisting of 10 mM imidazole, 10 mM HIBA and 10% methanol at pH 6.0 under +18 W, baseline separation was achieved for K+, Na+, Ca2+, Mg2+, Mn2+, Cd2+, Co2+, Ni2+ and Zn2+. Agreeable results at 95% confidence level were obtained using CE and inductively coupled plasma-atomic emission spectrometry (ICP-AES) for milk samples after protein removal. Baseline-resolved peaks for essential minerals were obtained for fresh and non-refrigerated reconstituted milks. Long-term stability was demonstrated by repeated determinations without rinsing and improvement in repeatability was shown by rinsing with 60 mM SDS in BGF. Information on metal speciation useful for nutritional assessment was obtained from CE to complement the ICP methods. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA.en_HK
dc.relation.ispartofElectrophoresisen_HK
dc.subjectCation analysisen_HK
dc.subjectCEen_HK
dc.subjectFood analysisen_HK
dc.subjectMetal analysisen_HK
dc.subjectMilken_HK
dc.titleSeparation and determination of metal cations in milk and dairy products by CEen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0173-0835&volume=28&spage=4156&epage=4163&date=2007&atitle=Separation+and+Determination+of+Metal+Cations+in+Milk+and+Dairy+Products+by+CEen_HK
dc.identifier.emailYeung, WSB:wsbyeung@hkucc.hku.hken_HK
dc.identifier.emailFung, YS:ysfung@hku.hken_HK
dc.identifier.authorityYeung, WSB=rp00331en_HK
dc.identifier.authorityFung, YS=rp00697en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/elps.200700541en_HK
dc.identifier.pmid17987609-
dc.identifier.scopuseid_2-s2.0-36549064255en_HK
dc.identifier.hkuros145378en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-36549064255&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume28en_HK
dc.identifier.issue22en_HK
dc.identifier.spage4156en_HK
dc.identifier.epage4163en_HK
dc.identifier.isiWOS:000251363800017-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridSze, KL=23019714100en_HK
dc.identifier.scopusauthoridYeung, WSB=7102370745en_HK
dc.identifier.scopusauthoridFung, YS=13309754700en_HK

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