Selective determination of cysteine using BSA-stabilized gold nanoclusters with red emission

The Analyst ◽  
2012 ◽  
Vol 137 (22) ◽  
pp. 5346 ◽  
Author(s):  
Ma-Lin Cui ◽  
Jia-Ming Liu ◽  
Xin-Xing Wang ◽  
Li-Ping Lin ◽  
Li Jiao ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Red Emission ◽  
Selective Determination

Ultra-sensitive and selective determination of a phenolic food additive using protein capped gold nanoclusters: a dual in-line fluorometric and colorimetric sensing probe

2021 ◽  
Author(s):  
Sekar Shankar ◽  
N. S. K. Gowthaman ◽  
P. Arul ◽  
Feng Chen ◽  
H. N. Lim ◽  
...  
Keyword(s):  
Gold Nanoclusters ◽  
Food Additive ◽  
Colorimetric Sensing ◽  
Selective Determination ◽  
Red Luminescence ◽  
Colorimetric Methods

The application of red luminescence BSA-AuNCs towards the selective determination of food additive tert-butylhydroquinone (TBHQ) was demonstrated by both fluorometric and colorimetric methods.

scholarly journals Selective determination of Ag+ in the presence of Cd2+, Hg2+ and Cu2+ based on their different interactions with gold nanoclusters

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33299-33306
Author(s):  
Rentian Guan ◽  
Lixia Tao ◽  
Yingying Hu ◽  
Cong Zhang ◽  
Yongping Wang ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Gold Nanoclusters ◽  
Fluorescence Method ◽  
Selective Detection ◽  
Selective Determination

A fluorescence method was developed for selective detection of Ag+ in the presence of Cd2+, Hg2+, and Cu2+ based on gold nanoclusters. The limit of detection for Ag+, Hg2+, Cd2+ and Cu2+ is 1.19 μM, 3.39 μM, 1.83 μM and 5.95 μM, respectively.

Ultra-sensitive fluorescence determination of chromium(vi) in aqueous solution based on selectively etching of protein-stabled gold nanoclusters

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104693-104698 ◽  
Author(s):  
Guo Jian-feng ◽  
Hou Chang-jun ◽  
Yang Mei ◽  
Huo Dan-qun ◽  
Fa Huan-bao
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoclusters ◽  
Cost Effective ◽  
Selective Determination ◽  
Chromium Vi ◽  
Fluorescent Method ◽  
Fluorescence Determination

In this work, we have developed a simple, cost-effective and sensitive fluorescent method for the selective determination of chromium(vi) ions (Cr(vi)) in aqueous solution.

Laser optoacoustic detection of trace concentration levels of ethylene, vinylchloride, and styrene in the atmosphere

1989 ◽  
Vol 54 (10) ◽  
pp. 2667-2673 ◽  
Author(s):  
Vojtěch Steiner ◽  
Pavel Engst ◽  
Zdeněk Zelinger ◽  
Milan Horák
Keyword(s):  
Detection Limit ◽  
Emission Line ◽  
Laser Line ◽  
Laser Source ◽  
Trace Concentration ◽  
Selective Determination ◽  
Hygienic Standard ◽  
Trace Concentrations ◽  
Concentration Levels

The optoacoustic analyzer with a tunable CO2 laser source employed in the present work permits a selective determination of ethylene in trace concentrations higher than 5 ppb (=detection limit for the 10P(14) emission line of the CO2 laser, ν = 949.5 cm-1) and of vinylchloride higher than 42 ppb (= detection limit for the 10P(22) CO2 laser line, ν= 942.4 cm-1). this method covers for both compounds the concentration range corresponding to the hygienic standard. It can be also used for the determination of styrene vapour with concentrations higher than 1.5 ppm.

Novel palladium(II) selective membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol

2010 ◽  
Vol 75 (5) ◽  
pp. 563-575 ◽  
Author(s):  
Moslem Mohammadi ◽  
Mehdi Khodadadian ◽  
Mohammad K. Rofouei
Keyword(s):  
Limit Of Detection ◽  
Membrane Electrode ◽  
Aqueous Samples ◽  
Selective Determination ◽  
Poly Vinyl Chloride ◽  
Selective Membrane ◽  
Ph Range ◽  
Palladium Content ◽  
Methyl Benzene

A plasticized poly(vinyl chloride) membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol (L) for highly selective determination of palladium(II) (in PdCl42– form) is developed. The electrode showed a good Nernstian response (29.6 ± 0.4 mV per decade) over a wide concentration range (3.1 × 10–7 to 1.0 × 10–2 mol l–1). The limit of detection was 1.5 × 10–7 mol l–1. The electrode has a response time of about 20 s, and it can be used for at least 2 months without observing any considerable deviation from Nernstian response. The proposed electrode could be used in the pH range of 2.5–5.5. The practical utility of the electrode has been demonstrated by its use for the estimation of palladium content in aqueous samples.

scholarly journals Expert System for Catalytic Titrimetry—Part 2: Determination of Monobasic Carboxylic Acids

1998 ◽  
Vol 81 (5) ◽  
pp. 1077-1086
Author(s):  
Biljana F Abramovic ◽  
Borislav K Abramovic ◽  
Ferenc F Gaál ◽  
Danilo M Obradovtc
Keyword(s):  
Expert System ◽  
Carboxylic Acids ◽  
Selective Determination

Abstract An expert system (ES) to solve the problem of choosing a catalytic titrimetric procedure for determining monobasic carboxylic acids is described. Carboxylic acids were divided into 3 groups—aliphatic, aromatic, and α-aminocarboxylic acids— based on their behavior in catalytic titrations with different indicator reactions, titrant, and/or solvent and the possibility of their selective determination in the presence of other acids

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