Determination of antimony(III) in environmental water samples in microemulsion system by the fluorescence quenching method

Wei, Qin; Yang, Jiali; Zhang, Yong; Chang, Guohua; Du, Bin

doi:10.1016/s0039-9140(02)00145-5

Cited by 17 publications

(6 citation statements)

References 3 publications

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“…As indicated by our previous study, [27][28][29][30] surfactants can enhance the sensitivity of many systems. Compared with a micelle, a microemulsion has a lower surface tension and strong soluble power to organic and inorganic substances.…”

Section: Selection Of Mediummentioning

confidence: 60%

A Highly Sensitive and Rapid Assay for Protein Determination in Human Urine and Penicillin Using a Rayleigh Light-Scattering Technique with Benzeneazo-8-acetylamino-1-naphthol-3,6- disulfonic Acid Sodium Salt

Wei

et al. 2006

ANAL. SCI.

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The quantitative analysis of protein is very vital in many fields, such as clinical analysis, medical research, protein industry and food chemistry. Many methods for the determination of proteins are continuously being put forward, including the Turbidity method, the Kjeldahl method, spectrophotometry, fluorophotometry and so on. [1][2][3][4][5][6][7] Recently, the Rayleigh lightscattering (RLS) technique has become a new and interesting method with many advantages. For instance, it can be performed using an ordinary fluorescence spectrometer. Also, the detection limit of proteins is quite low. This method has been widely used in biomacromolecules, such as proteins and nucleic acids, inorganic ion determinations and so on. [8][9][10][11][12] In the present work, based on the interaction of proteins with benzeneazo-8-acetylamino-1-naphthol-3,6-disulfonic acid sodium salt (also called azophloxine, AP, see Fig. 1) as a probe, a novel determination method was developed using the RLS technique. Azophloxine cannot be employed for protein determination using the spectrophotometric method for lower sensitivity, but can be served as a novel probe for the RLS technique with higher sensitivity. This expands the area of biomacromolecular probes for the RLS method.A microemulsion, as the medium, is introduced into protein determination, and can enhance the sensitivity of this method. Therefore, this assay is much more sensitive than most of the reported light-scattering methods, as displayed in Table 1. [13][14][15][16][17][18][19][20][21][22][23][24][25][26] The content of protein in human urine can provide much information in clinical analysis, and is often used as a reference for disease. At the same time, penicillin is also used in this work, which is a novel sample for protein determination using the RLS technique. If residual protein in penicillin is in excess, it can cause allergic reactions in many individuals, and also affect the yield of penicillin. It is thus necessary to develop a novel, rapid and accurate method for the determination of protein. The proposed method has been successfully applied to the determination of protein in human urine and penicillin samples. ExperimentalApparatus A Shimadzu Model UV-3101 spectrophotometer was employed for absorption spectral records. A Perkin-Elmer Model LS-55 luminescence spectrometer with 1.0 cm quartz cells was used to measure the intensity and spectra of RLS. A PHS-3B acidimeter was used in determining pH values. A simple and sensitive method was conducted for the determination of trace amounts of proteins with benzeneazo-8-acetylamino-1-naphthol-3,6-disulfonic acid sodium salt (azophloxine, AP) using a Rayleigh light-scattering (RLS) technique. At pH 2.60 and in the presence of an emulsifier OP microemulsion, the RLS of AP can be greatly enhanced by proteins, owing to the interaction between AP and protein. The enhanced intensity is proportional to the concentration of proteins. Four proteins, including bovine serum albumin (BSA), human serum albumin (HSA), lysozyme (...

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Section: Selection Of Mediummentioning

confidence: 60%

A Highly Sensitive and Rapid Assay for Protein Determination in Human Urine and Penicillin Using a Rayleigh Light-Scattering Technique with Benzeneazo-8-acetylamino-1-naphthol-3,6- disulfonic Acid Sodium Salt

Wei

et al. 2006

ANAL. SCI.

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“…Very good results are obtained The text was submitted by the authors in English. 13]. In this work, CTMAB microemulsion can enhance more effectively stability and sensitivity of the In(III)-DBH-PF complex among investigated media.…”

Section: Introductionmentioning

confidence: 85%

Rapid Fluorometric Determination of Trace Indium(III) in Microemulsion Medium after Preconcentration and Separation by Sulphydryl Dextrane Gel

Wei

Zhang

et al. 2005

J Anal Chem

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A new highly sensitive, stable, and accurate fluorometric method for the determination of indium(III) has been established in cetyltrimethylammonium bromide(CTMAB) microemulsion media. The excellent color-forming reagent 2,6,7-trihydroxy-9-(3,5-dibromo-4-hydroxyphenyl) fluorone (DBH-PF) reacts with indium(III) to form a purple complex with a 3 : 1 (ligand to metal) ratio in HAc-NaAc buffer solution at pH 4.94. The emission peak occurs at 556 nm with excitation at 525 nm. Indium(III) can be determined in the linear range of 0.005-0.30 µ g mL -1 with a detection limit of 0.0029 µ g mL -1 . Foreign ions are eliminated by preconcentration and separation with sulfhydryl dextranegel (SDG). The proposed method has been satisfactorily examined for the determination of indium(III) in ore and sludge samples. The relative standard deviations are in all instances less than 3.0%, and the recoveries are between 94.7, and 99.5%. Br OHBr

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“…Micro amounts of antimony, especially antimony(III) which is more toxic and mobile than antimony(V), 4 will stimulate respiratory tract, mucous membrane of alimentary canal and skin, even lead to pulmonary edema or hepatomegal. 5 Meanwhile, the toxicity of Sb also inuences environment aer solving in soil and impairs plant growth (root elongation of barley, shoot biomass of lettuce) and nitrication with certain concentration. 6 Therefore, applying this ame retardant in PVC is harmful to environment and human health.…”

Section: Introductionmentioning

confidence: 99%

One-step hydrothermal synthesis of nano zinc carbonate and its use as a promising substitute for antimony trioxide in flame retardant flexible poly(vinyl chloride)

Pan

Wang

2015

RSC Adv.

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In this article, zinc carbonate with a nano size (nano ZnCO 3 ) was prepared by the reaction of zinc nitrite and urea in a one step hydrothermal synthesis. The effects of antimony trioxide (Sb 2 O 3 ), nano ZnCO 3 and their mixture with different weight ratios on the flame retardancy of flexible poly(vinyl chloride) (PVC) were studied by using a limiting oxygen index test (LOI), a vertical burning test (UL-94) and a cone calorimeter test (CCT). The thermal stability of flame retardant flexible PVC composites was detected by thermogravimetric analysis (TGA). Very interestingly, it was found that substituting 75% Sb 2 O 3 with nano ZnCO 3 in the flexible PVC obviously improved the dripping behavior in a UL-94 test, increased the LOI value and greatly reduced the peak heat release rate and total heat release simultaneously in comparison to using them separately, suggesting a significant synergistic effect between nano ZnCO 3 and Sb 2 O 3 on improving the flame retardancy of flexible PVC. Importantly, tensile tests showed the addition of nano ZnCO 3 significantly enhanced the mechanical properties of flexible PVC. This work has offered a new approach to develop low or non Sb 2 O 3 containing flame retardant flexible PVC composites.

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Determination of antimony(III) in environmental water samples in microemulsion system by the fluorescence quenching method

Cited by 17 publications

References 3 publications

A Highly Sensitive and Rapid Assay for Protein Determination in Human Urine and Penicillin Using a Rayleigh Light-Scattering Technique with Benzeneazo-8-acetylamino-1-naphthol-3,6- disulfonic Acid Sodium Salt

A Highly Sensitive and Rapid Assay for Protein Determination in Human Urine and Penicillin Using a Rayleigh Light-Scattering Technique with Benzeneazo-8-acetylamino-1-naphthol-3,6- disulfonic Acid Sodium Salt

Rapid Fluorometric Determination of Trace Indium(III) in Microemulsion Medium after Preconcentration and Separation by Sulphydryl Dextrane Gel

One-step hydrothermal synthesis of nano zinc carbonate and its use as a promising substitute for antimony trioxide in flame retardant flexible poly(vinyl chloride)

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