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.

G-quadruplex DNAzymes-induced highly selective and sensitive colorimetric sensing of free heme in rat brain

The Analyst ◽  
2014 ◽  
Vol 139 (8) ◽  
pp. 1993-1999 ◽  
Author(s):  
Ruimin Li ◽  
Qin Jiang ◽  
Hanjun Cheng ◽  
Guoqiang Zhang ◽  
Mingming Zhen ◽  
...  
Keyword(s):  
Rat Brain ◽  
Colorimetric Sensing ◽  
Selective Determination ◽  
G Quadruplex ◽  
Free Heme

Direct selective determination of free heme in the cerebral system is of great significance due to the crucial roles of free heme in physiological and pathological processes.

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

Application of modifier-free gold nanoparticle colorimetric sensing for rapid screening and detection of vitamin B1

2020 ◽  
Vol 44 (22) ◽  
pp. 9223-9229 ◽  
Author(s):  
Paweenar Duenchay ◽  
Kantima Kaewjua ◽  
Orawon Chailapakul ◽  
Weena Siangproh
Keyword(s):  
Gold Nanoparticle ◽  
Vitamin B1 ◽  
Urine Samples ◽  
Rapid Screening ◽  
Colorimetric Sensing ◽  
Selective Determination ◽  
Sensing Platform ◽  
Free Gold

A simple and fast alternative colorimetric sensing platform for selective determination of vitamin B1 in urine samples was proposed.

Enzymatic method for selective determination of 4-aminobenzoic acid in urine

1990 ◽  
Vol 36 (11) ◽  
pp. 1937-1940 ◽  
Author(s):  
N Bando ◽  
T Ogawa ◽  
H Tsuji ◽  
K Sasaoka
Keyword(s):  
Pancreatic Function ◽  
Urine Samples ◽  
Enzymatic Method ◽  
Aminobenzoic Acid ◽  
Selective Determination ◽  
Subsequent Conversion ◽  
Colorimetric Assays ◽  
Colorimetric Methods

Abstract We developed a method for the selective determination of 4-aminobenzoic acid by use of 4-aminobenzoate hydroxylase (EC 1.14.13.27) to convert 4-aminobenzoic acid to 4-hydroxyaniline. The subsequent conversion of 4-hydroxyaniline to indophenol dye was quantified colorimetrically. The method is reproducible, and the assay response is linear up to 40 mumol/L. Selectivity exceeding that of the current colorimetric assays was demonstrated for these enzymatic determinations of 4-aminobenzoic acid concentrations in urine samples from patients undergoing tests of pancreatic function with bentiromide. This method effectively minimizes interferences from drugs and diet, a problem in current 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.

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