Quick determination of melamine in infant powder and liquid milk by Fourier transform infrared spectroscopy

2014 ◽  
Vol 6 (14) ◽  
pp. 5269-5273 ◽  
Author(s):  
Sana Jawaid ◽  
Farah N. Talpur ◽  
Hassan Imran Afridi ◽  
Shafi M. Nizamani ◽  
Abid A. Khaskheli ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Cost Effective ◽  
Fourier Transform Infrared ◽  
Ft Ir ◽  
Liquid Milk ◽  
Quick Determination ◽  
Ft Ir Spectroscopy

A simple, cost-effective and environmentally friendly analytical method was developed for the quantification of melamine (MEL) in liquid milk and infant powder by using transmission Fourier transform infrared (FT-IR) spectroscopy.

Application of Fourier transform infrared (FT-IR) spectroscopy in determination of microalgal compositions

2014 ◽  
Vol 151 ◽  
pp. 347-354 ◽  
Author(s):  
Yingying Meng ◽  
Changhong Yao ◽  
Song Xue ◽  
Haibo Yang
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Fourier Transform Infrared ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Determination of ß-Carotene and Lutein in Green Tea Using Fourier Transform Infrared Spectroscopy

2019 ◽  
Vol 62 (1) ◽  
pp. 75-81 ◽  
Author(s):  
Yong He ◽  
Yong He ◽  
Yiying Zhao ◽  
Chu Zhang ◽  
Chanjun Sun ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Least Squares ◽  
Fourier Transform Infrared Spectroscopy ◽  
Green Tea ◽  
Fourier Transform Infrared ◽  
Support Vector ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Abstract. The feasibility of using Fourier transform infrared (FT-IR) spectroscopy combined with chemometrics to determine the ß-carotene and lutein contents in green tea was investigated in this study. The relationship between pigment contents and spectral responses was explored by partial least squares (PLS), least squares support vector machine (LS-SVM), and extreme learning machine (ELM) methods. Next, 30 and 29 effective wavenumbers (EWs) for ß-carotene and lutein, respectively, were selected according to the weighted regression coefficients of the PLS regression models, and simplified determinant models were built on the extracted EWs. The ELM models based on the EWs obtained the best results, with correlation coefficients of calibration (rc) and prediction (rp), and residual prediction deviation (RPD) of 0.977, 0.946, and 2.84, respectively, for ß-carotene and 0.975, 0.937, and 2.88, respectively, for lutein. The overall results indicate that FT-IR spectroscopy combined with chemometrics could be a rapid and accurate alternative method for determining carotenoid pigments in green tea. Keywords: ß-carotene, Chemometrics, Fourier transform infrared spectroscopy, Green tea, Lutein.

Determination of Triglycerides on Cotton Fabrics Using Fourier Transform Attenuated Total Reflection Infrared Spectroscopy

1985 ◽  
Vol 39 (6) ◽  
pp. 1047-1050 ◽  
Author(s):  
R. S. Shreedhara Murthy ◽  
D. E. Leyden ◽  
J. Keith Grime
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Cotton Fabric ◽  
Cotton Fabrics ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Triglycerides deposited on cotton fabric in the form of artificial body soil (ABS) were quantified with the use of ATR/FT-IR spectroscopy after ABS had been transferred onto the ATR crystal under pressure. This approach improved the signal-to-background ratio by avoiding interference from cellulose absorption, and improved precision as contact of the cloth sample with the ATR crystal was not necessary. ABS concentrations comparable to natural body soil levels were determined. This procedure was shown to be useful for following the depletion of “surface” ABS after different washing procedures.

scholarly journals Determination of Glucose in Dried Serum Samples by Fourier-Transform Infrared Spectroscopy

1999 ◽  
Vol 45 (9) ◽  
pp. 1530-1535 ◽  
Author(s):  
Cyril Petibois ◽  
Vincent Rigalleau ◽  
Anne-Marie Melin ◽  
Annie Perromat ◽  
Georges Cazorla ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Glucose Oxidase ◽  
Glucose Concentration ◽  
Internal Standard ◽  
Fourier Transform Infrared ◽  
Serum Samples ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Abstract Background: Practical improvements are needed to allow measurement of glucose concentrations by Fourier- transform infrared (FT-IR) spectroscopy. We developed a new method that allows determination of the glucose concentration in dried sera. Methods: We studied 32 serum samples after fourfold dilution and desiccation before FT-IR analyses on a spectrometer operated at a resolution of 2.0 cm−1. We integrated all spectral windows at the surface of the spectrum in the C—O region. For comparison, glucose was measured in the sera by a glucose oxidase method. Results: One peak within the spectrum was most specific for glucose (997–1062 cm−1). Its surface integration showed a strong relationship with reference data (r = 0.998; P <0.001). FT-IR analyses of five glucose solutions were performed to determine its specific absorption at the same peak. In this way, glucose concentrations in serum spectra could be measured. For the first time while using FT-IR spectroscopy, no manipulation of spectra nor use of internal standard was necessary to obtain results in high accordance with glucose concentration measured by a conventional (glucose-oxidase) method (Sy|x = 0.25 mmol/L; r = 0.998). Conclusions: FT-IR spectroscopy appears to be an easy and accurate method to determine glucose concentration and could be widely used to simultaneously identify and quantify several metabolites in biological fluids or tissues.

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