Assessment of dentifrice adulteration with diethylene glycol by means of ATR-FTIR spectroscopy and chemometrics

López-Sánchez, Macarena; Domínguez‐Vidal, Ana; Ayora‐Cañada, María José; Molina‐Díaz, Antonio

doi:10.1016/j.aca.2008.05.032

Cited by 19 publications

(18 citation statements)

References 20 publications

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“…The presence of water and polyol molecules on the surface of the elaborated particles is also supported by the FT-IR study (Fig. 7) showing the bands corresponding to the bending and stretching vibrations of CH 2 of the polyol appearing, respectively, in the 1300-1650 and 2800-3000 cm À1 regions, the bands around 1650, 2325 and 2350 cm À1 corresponding to the bending mode of the OH groups of water and solvent and finally the broad bands around 3400 cm À1 corresponding to the stretching mode of the O-H groups [29,30].…”

Section: Thermal Analysissupporting

confidence: 58%

Synthesis, characterization and optical properties of ZnO nanoparticles with controlled size and morphology

Dakhlaoui

Jendoubi²,

Smiri³

et al. 2009

Journal of Crystal Growth

113

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Section: Thermal Analysissupporting

confidence: 58%

Synthesis, characterization and optical properties of ZnO nanoparticles with controlled size and morphology

Dakhlaoui

Jendoubi²,

Smiri³

et al. 2009

Journal of Crystal Growth

113

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“…The FDA has recently taken steps to reduce the risks due to biomedical substances adulterated with the economically motivated adulteration. To get rid of this problem, the FDA has directed the manufacturers of finished products to assay and confirm that incoming glycerol should meet the specified limits () [1–3]. Therefore, before using glycerol for any human consumption, it is a prime and uttermost requirement to test its purity with reasonable accuracy.…”

Section: Introductionmentioning

confidence: 99%

Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations

Tiwari

Singh

Mondal

et al. 2019

Int. J. Microw. Wireless Technol.

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A novel flexible radio frequency (RF) sensor is designed to facilitate the accurate testing of various samples used in the biomedical industry at the industrial, scientific and medical (ISM) frequency band. The proposed RF biosensor comprises a liquid channel-loaded interdigitated capacitor, which is integrated on a coplanar waveguide structure. The prototype of the sensor is fabricated on a 0.13 mm thin biodegradable polyethylene terephthalate polyester film to perform the testing of various bio-graded samples by recording the corresponding resonant frequency. It is observed that there is a noticeable change between the measured resonant frequencies of these samples, which primarily occurs due to the difference in their dielectric properties. The designed sensor was used to monitor and investigate the quality of glycerol, which is the most commonly used raw ingredient in the biomedical and food industry. The determination of glucose concentration in base fluids is considered to ease the challenges faced by doctors and biochemists regarding the monitoring of glucose concentration. It is found that the proposed sensor can quantify the glycerol purity up to the minimum specified adulteration level of 2 and 1% corresponding to toxic contaminants diethylene glycol and ethylene glycol, respectively, and the glucose concentration of 0.5 mg/ml.

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“…to quantify alterants, [6] and for the simultaneous quantification of multiple products for in-line quality control in manufacture. [7] So if working models can be developed for pharmaceutical drugs, there is a good potential that models for illicit drugs can also be developed.…”

Section: Introductionmentioning

confidence: 99%

Rapid Quantification of Methamphetamine: Using Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Chemometrics

et al. 2013

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In Australia and increasingly worldwide, methamphetamine is one of the most commonly seized drugs analysed by forensic chemists. The current well-established GC/MS methods used to identify and quantify methamphetamine are lengthy, expensive processes, but often rapid analysis is requested by undercover police leading to an interest in developing this new analytical technique. Ninety six illicit drug seizures containing methamphetamine (0.1%–78.6%) were analysed using Fourier Transform Infrared Spectroscopy with an Attenuated Total Reflectance attachment and Chemometrics. Two Partial Least Squares models were developed, one using the principal Infrared Spectroscopy peaks of methamphetamine and the other a Hierarchical Partial Least Squares model. Both of these models were refined to choose the variables that were most closely associated with the methamphetamine % vector. Both of the models were excellent, with the principal peaks in the Partial Least Squares model having Root Mean Square Error of Prediction 3.8, R2 0.9779 and lower limit of quantification 7% methamphetamine. The Hierarchical Partial Least Squares model had lower limit of quantification 0.3% methamphetamine, Root Mean Square Error of Prediction 5.2 and R2 0.9637. Such models offer rapid and effective methods for screening illicit drug samples to determine the percentage of methamphetamine they contain.

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Assessment of dentifrice adulteration with diethylene glycol by means of ATR-FTIR spectroscopy and chemometrics

Cited by 19 publications

References 20 publications

Synthesis, characterization and optical properties of ZnO nanoparticles with controlled size and morphology

Synthesis, characterization and optical properties of ZnO nanoparticles with controlled size and morphology

Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations

Rapid Quantification of Methamphetamine: Using Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Chemometrics

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