Hazards associated with the use of electrochemically prepared substrates in the qualitative analysis of aqueous solutions by surface-enhanced Raman spectroscopy

1993 ◽  
Vol 49 (5-6) ◽  
pp. 837-843 ◽  
Author(s):  
L. Markwort ◽  
P.J. Hendra
Keyword(s):  
Raman Spectroscopy ◽  
Qualitative Analysis ◽  
Aqueous Solutions ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals The adsorption of thiophenol on gold – a spectroelectrochemical study

2015 ◽  
Vol 17 (33) ◽  
pp. 21364-21372 ◽  
Author(s):  
Rudolf Holze
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Voltammetry ◽  
Aqueous Solutions ◽  
Gold Electrode ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycrystalline Gold

The adsorbate formed by adsorption of thiophenol on a polycrystalline gold electrode and brought into contact with aqueous solutions of 1 M HClO4and 0.1 M KClO4has been studied using cyclic voltammetry and surface-enhanced Raman spectroscopy.

scholarly journals Qualitative analysis of Sudan IV in edible palm oil

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Sampson Saj Andoh ◽  
Tarmo Nuutinen ◽  
Cheetham Mingle ◽  
Matthieu Roussey
Keyword(s):  
Raman Spectroscopy ◽  
Qualitative Analysis ◽  
Palm Oil ◽  
Surface Enhanced Raman Spectroscopy ◽  
International Agency ◽  
Chemometric Methods ◽  
Frequency Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sudan Iv

Abstract Background Palm oil is one of the most useful vegetable available. Sudan IV dye is used as hue enhancer in palm oil despite the ban as food colorant due to its carcinogenicity and mutagenicity by the International Agency for Research on Cancer (IARC). Methods Surface enhanced Raman spectroscopy (SERS) coupled with chemometric methods was applied to detect the presence of Sudan IV in some edible palm oil samples. Results We studied the samples within the 1200–1800 cm− 1 Raman frequency range. In predicting adulteration, we used 1388 cm− 1 Raman peak that is associated with Sudan IV as our marker. We were able to confirm adulteration in four of the five palm oil samples provided by the Food and Drug Authority of Ghana. Conclusions With these methods, we confirmed the results from Food and Drug Authorities of Ghana by proving that there were indeed Sudan IV adulteration in some palm oil samples.

Qualitative analysis of some alkanethiols on Au nanoparticles during SERS

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12131-12142 ◽  
Author(s):  
R. A. Harris ◽  
M. Mlambo ◽  
P. S. Mdluli
Keyword(s):  
Raman Spectroscopy ◽  
Qualitative Analysis ◽  
Au Nanoparticles ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Enhancement Factors ◽  
Surface Enhanced Raman ◽  
Surfactant Systems

The surface enhanced Raman spectroscopy enhancement factors (SERS EFs) for different AuNP–surfactant systems are measured and the observed trend is theoretically and qualitatively investigated.

Bacterial detection and differentiation via direct volatile organic compound sensing with surface enhanced Raman spectroscopy

2017 ◽  
Author(s):  
Caitlin S. DeJong ◽  
David I. Wang ◽  
Aleksandr Polyakov ◽  
Anita Rogacs ◽  
Steven J. Simske ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Bacterial Infections ◽  
Direct Detection ◽  
Point Of Care ◽  
Surface Enhanced Raman Spectroscopy ◽  
E Coli ◽  
Recent Emergence ◽  
Surface Enhanced ◽  
Volatile Organic ◽  
Surface Enhanced Raman

Through the direct detection of bacterial volatile organic compounds (VOCs), via surface enhanced Raman spectroscopy (SERS), we report here a reconfigurable assay for the identification and monitoring of bacteria. We demonstrate differentiation between highly clinically relevant organisms: <i>Escherichia coli</i>, <i>Enterobacter cloacae</i>, and <i>Serratia marcescens</i>. This is the first differentiation of bacteria via SERS of bacterial VOC signatures. The assay also detected as few as 10 CFU/ml of <i>E. coli</i> in under 12 hrs, and detected <i>E. coli</i> from whole human blood and human urine in 16 hrs at clinically relevant concentrations of 10<sup>3</sup> CFU/ml and 10<sup>4</sup> CFU/ml, respectively. In addition, the recent emergence of portable Raman spectrometers uniquely allows SERS to bring VOC detection to point-of-care settings for diagnosing bacterial infections.

Sign in / Sign up

Export Citation Format

Share Document