Retention behaviour of metal complexes with 5-sulphoquinoline-8-ol in reversed-phase ion-pair liquid chromatography

Feng, Yu‐Qi; Shibukawa, Masami; Oguma, Koichi

doi:10.1007/bf02269716

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although acetate buffer (pH 4.5) was used as the best medium for complexation of Al-morin, it was unsuitable eluent for HPLC here. Phosphate buffer cannot be used as the eluent because it could react with Al ion [32].…”

Section: Choice Of Mobile Phasementioning

confidence: 99%

“…The detection system consisted of a Varian Fluorichrom fluorescence detector (Varian, Walnut Creek, CA, USA) in series with a Waters 996 UV-Vis photodiode-array detector (PDA). The signals acquired from PDA and from fluorescence detector were recorded by Millennium32 and Model JS-3030 chromatographic working station (Johnsson), respectively. A Mettler Toledo 320 pH meter with a HA405-K2/120 combination electrode (Mettler-Toledo Instruments Shanghai, Shanghai) was used for pH measurement.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Morin applied in speciation of aluminium in natural waters and biological samples by reversed-phase high-performance liquid chromatography with fluorescence detection

Lian

Kang

et al. 2003

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

A reversed-phase high-performance liquid chromatographic method with fluorescence detection for the determination of labile monomeric aluminium has been developed through pre-column complexation using morin as the analytical reagent. The highly fluorescent aluminium-morin complex (excitation wavelength 418 nm, emission wavelength 490 nm) was separated on a Spherisorb ODS 2 column with an eluent consisting of 30% methanol and 70% water (pH 1.0 with perchloric acid). The most remarkable point of this protocol was that only the most toxic aluminium species, that is, free aqua-aluminium ion and its monomeric hydroxo complex ions, selectively respond among various aluminium complexes. This strategy has been successfully applied to direct fractionation of the toxic aluminium in natural waters and biological samples without any pretreatment.

show abstract

Section: Choice Of Mobile Phasementioning

confidence: 99%

mentioning

confidence: 99%

Morin applied in speciation of aluminium in natural waters and biological samples by reversed-phase high-performance liquid chromatography with fluorescence detection

Lian

Kang

et al. 2003

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

show abstract

“…They also illustrated the chromatographic applications of HQS as a post column fluorometric reagent for some metal ions determination. Recently, Feng et al [16,17] used tetrabutylammonium bromide as ion-pair reagent in C 18 reversed-phase chromatographic system coupled with fluorescence detection to investigate the chromatographic behavior of some metal chelate, especially Al III and Cd II . Paull et al [18] used tetrabutylammonium hydroxide as an ion-pair reagent in the reversed-phase chromatographic system, and added HQS in the mobile phase to separate Mg II , Zn II and Cd II coupled with on-line fluorometric de-…”

Section: Introductionmentioning

confidence: 99%

Chromatographic behavior of cadmium in an ion-pair reversed-phase micro HPLC system and its application to the determination of bio-available cadmium in soil samples

Wang

Yan

et al. 2003

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

A novel reversed phase ion-pair micro HPLC system with on-line fluorescence detection has been developed systematically and studied for the determination of cadmium in its bio-available fractions of soil samples. In this system, a micro ODS column of 1.0 mm i.d.x150 mm length and a mobile phase containing 6 mmol L(-1) 8-hydroxyquinoline 5-sulphonic acid (HQS), 3 mmol L(-1) cetyltrimethylammonium bromide (CTMABr), 10 mmol L(-1) acetic acid-acetate buffer (pH 5.1) as well as 50% acetonitrile at 50 microL min(-1) flow rate were employed to determine cadmium with a 2 microL flow cell through its fluorescence at 518 nm under 338 nm excitation. Furthermore, the composition of Cd-HQS chelate formed on the column was confirmed to be [Cd(HQS)(2)](2-) through a log-log plot method, and then combined with the ion-pair reagent by the electrostatic force under the chromatographic condition proposed. With such a method, the detection limit of cadmium was 8.48 ng mL(-1) (3sigma) with 1 microL sample injection, and the linear range for the determination of cadmium was 30-800 ng mL(-1) (R(2)=0.992). This method has been successfully applied to determination of cadmium in its bio-available fractions of BCR-483 and soil samples without interference from other coexistent metal ions. The RSD (n=6) was less than 7.3%. The results were in agreement with the indicative value for BCR-483 and those for the soil samples obtained by ICP-MS with a pretreatment of bis(1,1,3,3-tetramethylbutyl) phosphinic acid extraction.

show abstract

Evaluation of cadmium species lability using ion-pair reversed phase HPLC coupled on-line with inductively coupled plasma mass spectrometry

Yan

Yang

Wang

2011

Talanta

View full text Add to dashboard Cite

Retention behaviour of metal complexes with 5-sulphoquinoline-8-ol in reversed-phase ion-pair liquid chromatography

Cited by 5 publications

References 15 publications

Morin applied in speciation of aluminium in natural waters and biological samples by reversed-phase high-performance liquid chromatography with fluorescence detection

Morin applied in speciation of aluminium in natural waters and biological samples by reversed-phase high-performance liquid chromatography with fluorescence detection

Chromatographic behavior of cadmium in an ion-pair reversed-phase micro HPLC system and its application to the determination of bio-available cadmium in soil samples

Evaluation of cadmium species lability using ion-pair reversed phase HPLC coupled on-line with inductively coupled plasma mass spectrometry

Contact Info

Product

Resources

About