Developments in sample preparation and separation techniques for the determination of inorganic ions by ion chromatography and capillary electrophoresis

Haddad, Paul R.; Doble, Philip; Macka, Mirek

doi:10.1016/s0021-9673(99)00431-8

Cited by 99 publications

(54 citation statements)

References 110 publications

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“…It is intresting to note that among few sorts of sample preparation SPE has achieved a good reputation in analytical science due to its ease of operation, selective, time and costly chemical saving nature [8]. Some reviews have been published on the pre-treatment and sample preparation methodologies for the achiral analysis of pollutants [9][10][11][12][13]. Dabek-Zlotorzynska et al [10] reviewed the sample pretreatment methodologies for environmental analysis prior to CE.…”

Section: Sample Treatmentmentioning

confidence: 99%

Chiral Analyses of Pollutants by Capillary Electrophoresis

Ali¹

2010

TOCBMJ

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Abstract:The determination of enantiomeric composition of chiral xenobiotics and pollutants is a very difficult job due to their low amounts and poor detection by commonly used UV detector. But this sort of analysis is an important issue from the health point of view. The chiral analyses of these notorious pollutants by capillary electrophoresis have been discussed in this article. This review discusses the new trends and advancements, which have been achieved in the analyses of chiral pollutants using capillary electrophoresis and the state-of-art of their enaniomeric resolution. This article focuses on sample treatment, applications, optimization, detection, mechanisms of chiral resolution and future perspectives of CE in chiral resolution of xenobiotics. Besides, efforts have also been made to suggest the improvement in CE machine to make it ideal for the analyses of chiral xenobiotics at trace levels.

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Section: Sample Treatmentmentioning

confidence: 99%

Chiral Analyses of Pollutants by Capillary Electrophoresis

Ali¹

2010

TOCBMJ

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“…Solid phase extraction is attractive technique because of its notable advantages, namely simplicity and high pre-concentration factors. [20][21][22][23][24] In the J. Braz. Chem.…”

Section: Introductionmentioning

confidence: 99%

Solid phase extraction and spectrophotometric determination of mercury in tobacco and tobacco additives with 5-(p-aminobenzylidene)-thiothiorhodanine

Weizhu¹,

Hu²,

Ma³

et al. 2006

J. Braz. Chem. Soc.

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Foi desenvolvido um método altamente sensível, seletivo e rápido para a determinação de mercúrio, a partir da reação rápida de mercúrio(II) com 5-(p-aminobenzilideno)-tiorodanina (ABTR) e posterior extração em fase sólida do quelato colorido, utilizando discos C 18 . Em pH 3,5 e na presença do emulsificante-OP, ABTR reage com mercúrio(II) para formar um quelato vermelho na razão molar 1:2 (mercúrio:ABTR). O quelato foi enriquecido pela extração em fase sólida com discos C 18 e o quelato retido, eluído com dimethyl formamida (DMF). Um fator de enriquecimento na ordem de 50 foi obtido. Em DMF, a absortividade molar do quelato é 1,21×10 5 L mol -1 cm -1 a 545 nm, e a lei de Beer é obedecida no intervalo 0,01~3 μg mL -1 na solução medida. O desvio padrão relativo para onze replicatas a 0,01 μg mL -1 é 1,7%. Este método foi aplicado para a determinação de mercúrio em tabaco e aditivos de tabaco. Bom coeficiente de preconcentração foi encontrado, comparando-se o método proposto com outros similares.A highly sensitive, selective and rapid method for the determination of mercury based on the rapid reaction of mercury(II) with 5-(p-aminobenzylidene)-thiorhodanine (ABTR) and the solid phase extraction of the colored chelate with C 18 disks has been developed. At pH 3.5 and in the presence of emulsifier-OP medium, ABTR reacts with mercury(II) to form a red chelate of a 1:2 (mercury to ABTR) molar ratio. This chelate was enriched by solid phase extraction with C 18 disks and the retained chelate eluted form the disks with dimethyl formamide (DMF). An enrichment factor of 50 was achieved. In the DMF medium, the molar absorptivity of the chelate is 1.21×10 5 L mol -1 cm -1 at 545 nm, and Beer's law is obeyed in the 0.01~3 μg mL -1 range in the measured solution. The relative standard deviation for eleven sample replicate measurements at the 0.01 μg mL -1 level is 1.7%. This method was applied to the determination of mercury in tobacco and tobacco additives and good preconcentration was found between proposed and comparative methods results.

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“…Solid phase extraction is an attractive technique because of its notable advantages. [22][23][24][25][26] The present paper, based on the color reaction of QADMAA with nickel and the solid phase extraction of the colored chelate with C 18 disks, describes the development of a highly sensitive, selective and rapid method for the determination of nickel in water and biological samples.…”

Section: Introductionmentioning

confidence: 99%

Study on Solid Phase Extraction and Spectrophotometric Determination of Nickel in Waters and Biological Samples

Hu¹,

Yang²,

Huang³

et al. 2004

Bulletin of the Korean Chemical Society

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A sensitive, selective and rapid method for the determination of nickel based on the rapid reaction of nickel(II) with QADMAA and the solid phase extraction of the Ni(II)-QADMAA chelate with C 18 membrane disks has been developed. In the presence of pH 6.0 buffer solution and sodium dodecyl sulfonate (SDS) medium, QADMAA reacts with nickel to form a violet complex of a molar ratio of 1 : 2 (nickel to QADMAA). This chelate was enriched by solid phase extraction with C 18 membrane disks. An enrichment factor of 50 was obtained by elution of the chelates form the disks with the minimal amount of isopentyl alcohol. The molar absorptivity of the chelate was 1.32 × 10 5 L mol −1 cm −1 at 590 nm in the measured solution. Beer's law was obeyed in the range of 0.01-0.6 µg/mL. This method was applied to the determination of nickel in water and biological samples with good results.

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Developments in sample preparation and separation techniques for the determination of inorganic ions by ion chromatography and capillary electrophoresis

Cited by 99 publications

References 110 publications

Chiral Analyses of Pollutants by Capillary Electrophoresis

Chiral Analyses of Pollutants by Capillary Electrophoresis

Solid phase extraction and spectrophotometric determination of mercury in tobacco and tobacco additives with 5-(p-aminobenzylidene)-thiothiorhodanine

Study on Solid Phase Extraction and Spectrophotometric Determination of Nickel in Waters and Biological Samples

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