Abstract

This paper presents a model of a chromium-tanning solution used in leather processing. Chromium(III)sulfate is used in leather processes as a tanning agent. This model provides a quick and easy way of determining Cr(III) content in a tanning process having high chromium concentrations. Shifts of absorption peaks and changes in the intensity of absorption—due to different ligands of the chromium complex, aging, or differences in pH and temperature—all create difficulties in the modeling of a chromium-tanning solution. Different multilinear and factor-based regression methods were applied, and the results were compared. The influence of the derivatives in the calibration of chromium-tanning solutions was also studied.

Quantitative analysis of chromium in potatoes by laser-induced breakdown spectroscopy coupled with linear multivariate calibration

Tianbing Chen, Lin Huang, Mingyin Yao, Huiqin Hu, Caihong Wang, and Muhua Liu
Appl. Opt. 54(25) 7807-7812 (2015)

Determination of heavy metal chromium in pork by laser-induced breakdown spectroscopy

Lin Huang, Tianbing Chen, Xiuwen He, Hui Yang, Caihong Wang, Muhua Liu, and Mingyin Yao
Appl. Opt. 56(1) 24-28 (2017)

Nonlinear temperature calibration equation for Rhodamine B in different solutions for wide-temperature-range applications

Jiangning Zhou, Wenbin Yang, Yimin Yin, Shuang Chen, Bo Yan, Jinhe Mu, and Xinhua Qi
Appl. Opt. 58(6) 1514-1518 (2019)

Effect of different regression algorithms on the estimating leaf parameters based on selected characteristic wavelengths by using the PROSPECT model

Yangyang Zhang, Jian Yang, Xiuguo Liu, Lin Du, Shuo Shi, Jia Sun, and Biwu Chen
Appl. Opt. 58(36) 9904-9913 (2019)

Self-referenced method for optical path difference calibration in low-coherence interferometry

M. Laubscher, L. Froehly, B. Karamata, R. P. Salathé, and T. Lasser
Opt. Lett. 28(24) 2476-2478 (2003)