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Sebaiy MM, El-Shanawany AA, Baraka MM, Abdel-Aziz LM. Novel monofunctional and bifunctional boronic acid-functionalized squarylium dyes as precolumn and on-column labels for protein analysis by capillary electrophoresis with laser-induced fluorescence. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201800211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mahmoud M. Sebaiy
- Chemistry Department; Wake Forest University; Winston-Salem North Carolina
- Medicinal Chemistry Department, Faculty of Pharmacy; Zagazig University; Zagazig Egypt
| | | | - Mohamed M. Baraka
- Medicinal Chemistry Department, Faculty of Pharmacy; Zagazig University; Zagazig Egypt
| | - Lobna M. Abdel-Aziz
- Medicinal Chemistry Department, Faculty of Pharmacy; Zagazig University; Zagazig Egypt
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2
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Yu X, Mou C. A Flow Injection Chemiluminescence Method for the Determination of Protein Using Copper(II)-Alizarin Red S Complex as an Efficient Chemiluminescent Probe. ANAL LETT 2011. [DOI: 10.1080/00032719.2010.500773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Bian Y, Cai C, Gong H, Chen X. Rapid and sensitive determination of proteins with Eriochrome Red in the presence of anionic surfactant by multi-spectroscopic methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:512-517. [PMID: 20638325 DOI: 10.1016/j.saa.2010.06.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 06/08/2010] [Accepted: 06/17/2010] [Indexed: 05/29/2023]
Abstract
A new high-sensitivity detection of protein assay at the nanogram level is proposed based on multi-spectroscopic methods including resonance light scattering (RLS), atomic force microscopy (AFM), ultraviolet spectra (UV) and fluorescence spectra etc. Under the optimum conditions, the amplified RLS signals of anionic azo dyes Eriochrome Red B (ERB) in the presence of anionic surfactant sodium dodecyl sulphonate (SDS) was in proportion to the concentration of proteins in the range of 0.0-3.5 mg L(-1) and 3.5-12.5 mg L(-1) for bovine serum albumin (BSA), 0.0-2.0 mg L(-1) and 2.0-8.0 mg L(-1) for human serum albumin (HSA). The detection limits were 4.2 ng mL(-1) and 2.7 ng mL(-1), respectively. The method was satisfactorily applied to the measurement of total protein in human serum samples and a high-sensitivity was achieved.
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Affiliation(s)
- Yongru Bian
- College of Chemistry, Xiangtan University, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan, Hunan 411105, PR China
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4
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Wei Q, Wu D, Du B, Zhang H, Ou QY. Study on the reaction of proteins with 5′-nitrosalicylfluorone-molybdenum(VI) complex by spectrophotometry in PVA 124 microemulsion. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20040220720] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Zhao FL, Li KA, Chen LH. Microdetermination of Proteins by Enhanced Rayleigh Light Scattering Spectroscopy with Thorin. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20020200414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Huang C, Zhang K, Ci Y. Sensitization of surfactants on the chemiluminescence reaction of fluorescein isothiocyanate labeled proteins. ACTA ACUST UNITED AC 2007; 70:341-7. [PMID: 17011040 DOI: 10.1016/j.jbbm.2006.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2005] [Revised: 07/30/2006] [Accepted: 08/04/2006] [Indexed: 11/30/2022]
Abstract
The effect of surfactants on fluorescein isothiocyanate (FITC)-bovine serum albumin (BSA)-hypochlorite (ClO(-)), FITC-human serum albumin (HSA)-ClO(-), FITC-ovoconalbumin (OVA)-ClO(-), FITC-hemoglobin (Hb)-ClO(-) systems were investigated with chemiluminescence method by the reversed phase flow injection. It was found that the chemiluminescence (CL) intensity of each system was increased greatly in the presence of cationic surfactants. Cethyltrimethylammonium bromide (CTAB) is the optimal surfactant of these systems. The optimal conditions of the CL reaction and the optimal concentration of CTAB were examined and the function of cationic surfactant CTAB on the CL reaction was also discussed.
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Affiliation(s)
- Chunbao Huang
- Department of Chemistry, Huanggang Normal University, Huangzhou 438000, China
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7
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Chen Y, Yang J, Wang Z, Wu X, Wang F. Scopoletine as fluorescence probe for determination of protein. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 66:686-90. [PMID: 16859971 DOI: 10.1016/j.saa.2006.04.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Revised: 04/11/2006] [Accepted: 04/14/2006] [Indexed: 05/11/2023]
Abstract
Scopoletine (SLT), 7-hydroxy-6-methoxylcoumarin, is known to possess biological activities such as abirritating and anti-tumor, it can quench intrinsic fluorescence of bovine serum albumin (BSA) and the fluorescence intensity of itself is enhanced. So, SLT is used as fluorescence probe for quantitative determination of protein. The experiments indicate that under optimum conditions, the enhanced intensity of fluorescence is in proportion to the concentration of proteins in a wide range, and their detection limits (S/N=3) are 1.4 x 10(-8)g mL(-1) for BSA and 1.1 x 10(-8)g mL(-1) for HSA, respectively. Samples were satisfactorily determined. The interaction mechanism is also discussed.
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Affiliation(s)
- Yanjing Chen
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
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8
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Huang CB, Zhang K, Liu XL, Wang SF. A flow-injection chemiluminescence method for the determination of human serum albumin, using the reaction of fluorescein–human serum albumin–sodium hypochlorite by the enhancement effect of the cationic surfactant cetyltrimethylammonium bromide. LUMINESCENCE 2007; 22:393-400. [PMID: 17471452 DOI: 10.1002/bio.975] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The interaction between surfactant and fluorescein was studied, using a fluorescence spectroscopy and flow-injection (FI) chemiluminescence (CL) method. It was found that the cationic surfactant cetyltrimethylammonium bromide (CTAB) could cause the structural transformation of fluorescein from the quinone to the spirolactone form, and greatly enhance the CL intensity of the fluorescein-human serum albumin (HSA) complex. Based on this finding, a rapid and sensitive FI-CL method was developed for the determination of HSA. Under the optimum conditions, the proposed method has a linear range of 0.05-24.0 microg/mL, with a detection limit of 0.03 microg/mL for HSA (3sigma). The relative standard deviation (RSD) of 1.2 microg/mL HSA (n = 8) is 0.8%. The method was applied to the determination of protein content in urine samples, with satisfactory results. Density functional theory was used to study the mechanism of surfactant-enhanced CL intensity of the fluorescein-HSA complex.
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Affiliation(s)
- Chun-Bao Huang
- School of Chemistry and Applied Chemistry, Huanggang Normal University, Huangzhou 438000, People's Republic of China.
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9
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MA CQ, LI KA, TONG SY. Selective Spectrophotometric Determination of Human Serum Albumin with Tetraiodo Phenol Sulfonphthalein. ANAL LETT 2006. [DOI: 10.1080/00032719708006421] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Qin W, Dan W, Bin D, Zaijun L, Yanqiang H. A spectrophotometric method for determination of total proteins in cow milk powder samples using the o-nitrophenylfluorone/Mo(VI) complex. J Food Compost Anal 2006. [DOI: 10.1016/j.jfca.2005.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Oszwałdowski S. Chelates of cobalt(III) and iron(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol as test probes for the characterization of chromatographic effects on a reversed-phase liquid chromatography stationary phase. J Chromatogr A 2005; 1099:111-20. [PMID: 16330276 DOI: 10.1016/j.chroma.2005.08.086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2005] [Revised: 08/27/2005] [Accepted: 08/29/2005] [Indexed: 11/19/2022]
Abstract
The chromatographic effects on a reversed-phase liquid chromatography (RPLC) phase were established with the use of chelates system: cobalt(III) and iron(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol as the test probes. Both chelates have the same octahedral structure, M:L = 1:2, the former chelate is cationic and can be used to probe the ion-exchange phenomena on a RPLC phase, whereas the latter is not charged and can be used as reference molecule with respect to the charged one. Based on well-established LC phenomena referred in the literature, the suitability of the chelate system for examining some chromatographic effects was tested. It was concluded that the proposed test method is sensitive towards the ion-exchange phenomena on the LC phase and the hydrogen bonding between the solvent eluent and the LC phase. In addition, chromatographic effects due to the presence of ultrasonic field or due to the presence of aromatic amines in the eluent were observed with the help of the proposed test method. Based on molecular computation, the properties of chelates were compared with properties of quaternary amines, the probes most frequently used for testing LC phases, and the possible differences in an interaction of the mentioned compounds with a surface of a RPLC phase were indicated.
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Affiliation(s)
- Sławomir Oszwałdowski
- Department of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, ul. Noakowskiego 3, 00-664 Warsaw, Poland.
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12
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Wang Y, Feng L, Jiang C. Fluorimetric study of the interaction between human serum albumin and quinolones-terbium complex and its application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:2909-14. [PMID: 16165030 DOI: 10.1016/j.saa.2004.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2004] [Accepted: 11/01/2004] [Indexed: 05/04/2023]
Abstract
A highly sensitive spectrofluorimetric method is proposed for determination of human serum albumin (HSA) and some quinolone drugs. Using quinolones-terbium (Tb3+) complex as a fluorescent probe, in the buffer solution of pH 7.8, HSA can remarkably enhance the fluorescence intensity of the quinolones-Tb3+ complex at 545 nm and the enhanced fluorescence intensity of Tb3+ ion is in proportion to the concentration of HSA and quinolone drugs. Optimum conditions for the determination of HSA were also investigated. The linear ranges and limits of detection are 8.0 x 10(-9) to 8.0 x 10(-8) mol L(-1), 4.20 x 10(-9) mol L(-1) (for HSA); 1.0 x 10(-6) to 4.0 x 10(-6) mol L(-1), 1.87 x 10(-8) mol L(-1) (for norfloxacin) and 1.0 x 10(-7) to 1.0 x 10(-6) mol L(-1), 4.82 x 10(-8) mol L(-1) (for enoxacine), respectively. This method is simple, practical and relatively free interference from coexisting substances, as well as much more sensitive than most of the existing assays.
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Affiliation(s)
- Yusheng Wang
- Department of Chemistry, Shandong Normal University, Jinan 250014, China
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13
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Wang F, Yang J, Wu X, Liu S. Study of the interaction of proteins with curcumin and SDS and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:2650-6. [PMID: 16043060 DOI: 10.1016/j.saa.2004.10.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2004] [Accepted: 10/11/2004] [Indexed: 05/03/2023]
Abstract
It is found that protein and sodium dodecyl sulphonate (SDS) can enhance resonance light scattering (RLS) of curcumin (CU). Based on this phenomenon, a new quantitative method for protein in aqueous solution has been developed. In the BR (pH 3.5) buffer, the RLS intensity of CU-SDS system is greatly enhanced by protein. The enhanced RLS is proportional to the concentration of protein in the range of 0.00020-20.0 microgml(-1) for bovine serum albumin (BSA) and 0.00040-1.0 microgml(-1) for human serum albumin (HSA) and their detection limits are 0.16 and 0.041 ngml(-1), respectively. An actual sample is satisfactorily determined. In addition, the interaction mechanism between protein and CU-SDS is also studied by using multi-techniques such as RLS, absorption spectroscopy and fluorescence, zeta potential assay measurement.
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Affiliation(s)
- Feng Wang
- Key Lab of Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
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14
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Feng S, Pan Z, Fan J. Determination of trace proteins with pyronine Y and SDS by resonance light scattering. Anal Bioanal Chem 2005; 383:255-60. [PMID: 16132131 DOI: 10.1007/s00216-005-3402-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2005] [Revised: 05/24/2005] [Accepted: 06/15/2005] [Indexed: 11/29/2022]
Abstract
A new resonance light scattering (RLS) probe for determining proteins is presented. The weak RLS of pyronine Y-SDS can be enhanced substantially by adding proteins in the presence of H2SO4, resulting in a strong and wide RLS band in the region 310-425 nm. The interaction of pyronine Y-SDS with proteins was studied on the basis of this behavior and a new quantitative method was developed for determining proteins. The enhanced RLS intensity is proportional to the concentration of proteins in the range 0.15-3.6 microg mL(-1) for bovine serum albumin (BSA) and 0.06-4.8 microg mL(-1) for human serum albumin (HSA), with detection limits of 21.0 and 12.0 ng mL(-1), respectively. This method is characterized by high sensitivity, rapidity of reaction, and simplicity. Four synthetic samples were determined satisfactorily and recovery was 99.5-101.5%. Results for human serum and urine samples were in agreement with those obtained by the Bradford method, with relative standard deviations (RSD) of 1.5-3.1%.
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Affiliation(s)
- Suling Feng
- College of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453007, PR China.
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15
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Liu Y, Yang J, Liu S, Wu X, Su B, Wu T. Resonance light scattering technique for the determination of protein with rutin and cetylpyridine bromide system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:641-646. [PMID: 15649795 DOI: 10.1016/j.saa.2004.05.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2004] [Accepted: 05/17/2004] [Indexed: 05/24/2023]
Abstract
A new resonance light scattering (RLS) assay of protein is presented. In Tris-NaOH (pH = 10.93) buffer, the RLS of rutin-cetylpyridine bromide (CPB) system can be greatly enhanced by protein, including bovine serum albumin (BSA) and human serum albumin (HSA). The enhanced RLS intensities are in proportion to the concentration of proteins in the range of 5 x 10(-9) to 2.5 x 10(-6) g ml(-1) for BSA and 2.5 x 10(-8) to 3.5 x 10(-6) g ml(-1) for HSA. The detection limits (S/N = 3) are 3.0 ng ml(-1) for BSA and 10.0 ng ml(-1) for HSA. Samples are determined satisfactorily.
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Affiliation(s)
- Yang Liu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
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16
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Goicoechea H, Roy BC, Santos M, Campiglia AD, Mallik S. Evaluation of two lanthanide complexes for qualitative and quantitative analysis of target proteins via partial least squares analysis. Anal Biochem 2005; 336:64-74. [PMID: 15582560 DOI: 10.1016/j.ab.2004.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2004] [Indexed: 10/26/2022]
Abstract
Two lanthanide complexes, namely 5-aminosalicylic acid ethylenediaminetetraacetate europium(III) (5As-EDTA-Eu3+) and 4-aminosalicylic acid ethylenediaminetetraacetate terbium(III), were evaluated for the analysis of carbonic anhydrase, human serum albumin (HSA), and gamma-globulin. Quantitative analysis is based on their luminescence enhancement upon protein binding and qualitative analysis on their lifetime capability to recognize the binding protein. Analytical figures of merit are presented for the three proteins. The limits of detection with 5As-EDTA-Eu3+ are at the parts per billion level. Partial least square regression analysis is used to determine HSA and gamma-globulin in binary mixtures without previous separation at the concentration ranges typically found in clinical tests of human blood serum.
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Affiliation(s)
- Hector Goicoechea
- Department of Chemistry, University of Central Florida, P.O. Box 25000, Orlando, FL 32816-23366, USA
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17
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Jiang C, Luo L. Spectrofluorimetric Determination of Human Serum Albumin Using a Tetracycline–Europium Complex. ANAL LETT 2004. [DOI: 10.1081/al-120034058] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Zhong H, Wang K, Chen HY. Protein analysis with tetra-substituted sulfonated cobalt phthalocyanine by the technique of Rayleigh light scattering. Anal Biochem 2004; 330:37-42. [PMID: 15183759 DOI: 10.1016/j.ab.2004.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2003] [Indexed: 11/25/2022]
Abstract
This is the first report of cobalt-tetrasulfonatophthalocyanine (CoTSPc) as a probe of Rayleigh light scattering (RLS) to determine proteins at nanogram levels. A highly sensitive method has been developed for the determination of proteins by the light scattering technique on a common spectrofluorimeter, based on the fact that the weak RLS of CoTSPc can be greatly enhanced in the presence of proteins. Under optimum conditions, the linear ranges of the calibration curves were 0.10-34.3 microg x mL(-1) for both human serum albumin and bovine serum albumin, with detection limits of 15.5 and 13.9 ng x mL(-1), respectively. Moreover, there is almost no interference of any amino acids and metal ions. The method has been applied to the direct determination of total proteins in human serum samples, and the results were satisfactory with clinical data provided.
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Affiliation(s)
- Hui Zhong
- Department of Chemistry, Nanjing University, Nanjing, 210093, People's Republic of China
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19
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Long X, Zhang H, Bi S. Frequency doubling scattering and second-order scattering spectra of phosphato-molybdate heteropoly acid-protein system and their analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2004; 60:1631-1636. [PMID: 15147708 DOI: 10.1016/j.saa.2003.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Revised: 08/01/2003] [Accepted: 09/11/2003] [Indexed: 05/24/2023]
Abstract
In the sulfuric acid medium, the reaction of heteropoly compounds with proteins could result in the enhancement of frequency doubling scattering (FDS) and second-order scattering (SOS). Based on the characteristic, a novel method for the determination of trace amounts of protein by using the FDS and SOS method has been developed. Their maximum scattering wavelengths, lambda(ex)/lambda(em), appear at 940/470 nm for FDS and 350/700 nm for SOS, respectively. In a certain range, the concentration of proteins is directly proportional to the enhanced intensity of FDS and SOS. The suitable reaction conditions, affecting factors as well as the influence of some coexisiting substances were investigated. The methods exhibited high sensitivity, and the detection limits were in the range of 8.6-39.3 ng ml(-1) depending on different methods. The method had good selectivity, and was applied to the determination of protein in synthetic samples and practical samples with satisfactory results.
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Affiliation(s)
- Xiufen Long
- State Key Laboratory of Coordination Chemistry, Department of Chemistry, Nanjing University, Nanjing 210093, China
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20
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Long X, Liu S, Kong L, Liu Z, Bi S. A study on the interaction of proteins with some heteropoly compounds and their analytical application by resonance Rayleigh scattering method. Talanta 2004; 63:279-86. [DOI: 10.1016/j.talanta.2003.10.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2003] [Revised: 10/23/2003] [Accepted: 10/23/2003] [Indexed: 10/26/2022]
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21
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Spectrofluorimetric determination of human serum albumin using a doxycycline–europium probe. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2003.11.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Liu S, Yang J, Wu X, Wang F, Wang F, Jia Z, Mao L. Study on the interaction between protein and Eu(III)-chlorotetracycline complex and the determination of protein using the ?uorimetric method. LUMINESCENCE 2004; 19:352-7. [PMID: 15558687 DOI: 10.1002/bio.792] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Chlorotetracycline (CTC) can react with europium ions Eu3+, and the complex emits the intrinsic fluorescence of Eu3+. The intensity is greatly enhanced by proteins and this forms the basis of a new fluorimetric method for determination of protein. Further research indicates that under optimum conditions, the enhanced intensity of fluorescence is in proportion to the concentration of proteins, in the range 2.0 x 10(-7)-1.0 x 10(-5) g/mL for bovine serum albumin (BSA) (linear equation, I(f) = 34.35933 + 11.54467 x 10(6)C)(r = 0.99895) and 8.0 x 10(-7)-1.0 x 10(-5) g/mL for human serum albumin (HSA) (linear equation, I(f) = 76.58881 + 5.3569 x 10(6)C) (r = 0.99283). Detection limits (S/N = 3) were 8.9 x 10(-9) g/mL for BSA and 3.3 x 10(-8) g/mL for HSA. In an assay for BSA in calf serum, this method gave a value close to that determined by the UV spectrophotometric method.
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Affiliation(s)
- Shufang Liu
- Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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Zhao S, Liu D, Li S. Determination of proteins using the p-acetylchlorophosphonazo-barium(II) complex as a spectroprobe. ANAL SCI 2003; 19:1173-6. [PMID: 12945672 DOI: 10.2116/analsci.19.1173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel spectrophotometric method has been developed for the determination of proteins using the p-acetychlorophosphonazo (CPA-pA)-barium(II) complex as a spectroprobe. In the pH range of 2.0-2.8, the absorbance of the CPA-pA-barium(II) complex at 649 nm is greatly decreased by protein. The absorbance decrease is in proportion to the concentration of protein in the range of 0-20 mg/L. The apparent molar absorptivities are 1.56 x 10(6), 1.70 x 10(6) and 6.04 x 10(5) L mol(-1) cm(-1) for bovine serum albumin (BSA), human serum albumin (HAS) and ovalbumin (OVA), respectively. The method is reproducible and simple, and has been used to determine total protein in human sera. The results are in agreement with those obtained by the pyrocatechol violet (PV)-Mo(VI) method, with relative standard deviations of 2.5-3.5% (n=6).
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Affiliation(s)
- Shulin Zhao
- Department of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, China
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24
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Feng P, Huang CZ, Li YF. Direct quantification of human serum albumin in human blood serum without separation of gamma-globulin by the total internal reflected resonance light scattering of thorium-sodium dodecylbenzene sulfonate at water/tetrachloromethane interface. Anal Biochem 2002; 308:83-9. [PMID: 12234467 DOI: 10.1016/s0003-2697(02)00221-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A direct quantification of human serum albumin (HSA) in blood serum samples without separation is proposed based on the measurements of total internal reflected resonance light scattering (TIR-RLS) at water/tetrachloromethane (H(2)O/CCl(4)) interfaces. In the pH range of 6.37-6.59, the coadsorption of the binary complex of HSA-Th(IV) with sodium dodecylbenzene sulfonate occurs at the H(2)O/CCl(4) interface, forming an amphiphilic layer and displaying greatly enhanced TIR-RLS signals with the maximum peak located at 340-370 nm. The enhanced TIR-RLS intensity is in proportion to the HSA concentration in the range 0.15-1.0 micro gml(-1). The limit of detection is 14.4 ngml(-1). The contents of HSA in blood serum samples were determined with the recovery of 97.1-102.3% and RSD of 0.6-2.9%, which are identical to those obtained according to the spectrofluorimetric method using chrome azurol S.
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Affiliation(s)
- Ping Feng
- Institute of Environmental Chemistry, Southwest Normal University, Chongqing 400715, People's Republic of China
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Mori I. [Photometric analysis with reaction between metal ion (M) and organic reagent (R)]. YAKUGAKU ZASSHI 2001; 121:707-31. [PMID: 11676174 DOI: 10.1248/yakushi.121.707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Firstly, the syntheses of various organic reagents (R) containing such xanthene derivatives as O-hydroxyhydro-quinonephthalein (QnPh), and 3,4,5,6-tetrahydroxyfluoran (gallein, Gall) were studied. Secondarily, the coexisting effects of surfactant (cationic-, anionic-, amphoteric- and nonionic-surfactants alone or combination) on the coloring or fluorescence reactions between various (R) such as xanthene derivatives, aromatic amines and various metal ions (M) such as bismuth(III), tin(IV), iron(III), molybdenum(VI), uranium(VI), cobalt(II), aluminum(III), etc. were systematically investigated. Thirdly, numerous simple and sensitive photometric analyses (spectrophotometry and fluorophotometry) for various (M) and organic compounds(Org) such as biological samples, and pharmaceutical preparations by formation reactions of (R-M) binary or ((R-M)-Org) ternary complexes were established in the coexistence of surfactant alone or combination.
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Affiliation(s)
- I Mori
- Laboratory of Analytical Chemistry II, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki 569-1094, Japan
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Guo ZX, Shen HX. Sensitive and simple determination of protein by resonance Rayleigh scattering with 4-azochromotropic acid phenylfluorone. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(99)00819-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Guo ZX, Hao YM, Cong X, Shen HX. Application of the dibromohydroxyphenylfluorone–molybdenum(VI) complex to the sensitive spectrophotometric determination of protein. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(99)00564-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Guo ZX, Shen HX. A highly sensitive assay for protein using resonance light-scattering technique with dibromohydroxyphenylfluorone-molybdenum(VI) complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 1999; 55A:2919-2925. [PMID: 10659451 DOI: 10.1016/s1386-1425(99)00168-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
At pH 2.8 and in the presence of 0.090% p-octylpolyethyleneglycol phenylether, the resonance light-scattering (RLS) spectrum of molybdenum(VI) complex with dibromohydroxyphenylfluorone (DBHPF) has a sharp peak at 586 nm. If the micro protein coexists with Mo(VI) and DBHPF, the RLS intensity of the complex at 586 nm is significantly enhanced by protein due to the binding interaction between protein and DBHPF-Mo(VI) complex. Based on this a new assay for protein is described. The dynamic ranges for bovine and human serum albumins are both 0.05-0.75 mg l-1 with detection limits of 13 and 15 ng ml-1, respectively. Besides high sensitivity, the method is characterized by good reproducibility, rapidity of reaction, good stability of chemical system, commonality of spectrofluorometer, few coexisting substances, especially detergents. The determinations of diluted human serum and urine by this method give the results very close to these by the Coomassie brilliant blue G-250 colorimetry, with relative standard deviations of five duplicates of 1.8-2.5%.
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Affiliation(s)
- Z X Guo
- Department of Chemistry, Nankai University, Tianjin, People's Republic of China
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Guo ZX, Shen HX. A novel method for the determination of protein utilizing 4-azochromotropic acid phenylfluorone–molybdenum(VI) complex. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(99)00354-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Fluorescence Enhancement of Oxadiazole by Albumin and the Microdetermination of Albumin by Fluorospectrophotometry. Microchem J 1998. [DOI: 10.1006/mchj.1998.1617] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Nakamura J, Igarashi S. Highly Sensitive Spectrophotometric and Spectrofluorometric Determinations of Albumin with 5,10,15,20-Tetrakis(4-sulfophenyl)porphine. ANAL LETT 1996. [DOI: 10.1080/00032719608001449] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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