Abstract

Samples of artisanal honey produced in Ireland over a number of harvests have been obtained directly from producers. Adulterant solutions containing both fructose and glucose at ratios of 0.7: 1, 1.2: 1 and 2.3: 1 w/w were prepared. Honeys and adulterants were adjusted to a constant solids content. Visible and near infrared (400–2498 nm) transflectance spectra of the honeys were collected before and after adulteration at levels of 7, 14 and 21% w/w of each of the fructose-plus-glucose adulterant solutions. Chemometric analysis of the spectral collection by discriminant partial least squares regression (PLS1), k-nearest neighbours (k-NN) and soft independent modelling of class analogy (SIMCA) have been performed with a view to discriminating between the unadulterated and adulterated honey samples. Discriminant partial least squares regression proved to be the most accurate of these three methods.

© 2003 NIR Publications

Weak-value amplified surface plasmon resonance sensor based on joint detection of optical activity and refractive index

Liping Xu, Xin Yao, Gang Wen, Jiangtao Xu, Lan Luo, Zhiyou Zhang, Hao Wu, Peng Wu, Tianying Chang, and Hong-Liang Cui
Opt. Express 31(25) 41622-41634 (2023)

Glucose sensing in human epidermis using mid-infrared photoacoustic detection

Jonas Kottmann, Julien M. Rey, Joachim Luginbühl, Ernst Reichmann, and Markus W. Sigrist
Biomed. Opt. Express 3(4) 667-680 (2012)

Temperature measurements of turbid aqueous solutions using near-infrared spectroscopy

Naoto Kakuta, Hidenobu Arimoto, Hideyuki Momoki, Fuguo Li, and Yukio Yamada
Appl. Opt. 47(13) 2227-2233 (2008)

Rapid detection of carbon-nitrogen ratio for anaerobic fermentation feedstocks using near-infrared spectroscopy combined with BiPLS and GSA

Jinming Liu, Nan Li, Feng Zhen, Yonghua Xu, Wenzhe Li, and Yong Sun
Appl. Opt. 58(18) 5090-5097 (2019)

Determination of glucose in whole blood samples by mid-infrared spectroscopy

Yoen-Joo Kim, Sangjoon Hahn, and Gilwon Yoon
Appl. Opt. 42(4) 745-749 (2003)