title: Determination of main categories of components in corn steep liquor by near-infrared spectroscopy and partial least-squares regression.
abstract: Corn steep liquor (CSL) is an important raw material that has a high nutritional value and serves as a nitrogen source. This study aimed to develop a fast, versatile, cheap, and environmentally safe analytical method of quantifying the total acidity (TA) of CSL as well as its contents of dry matter (DM), total sugars (TS), total reducing sugars (TRS), total free amino acids (TFAA), total nitrogen (TN), and total sulfite (TSu). The near-infrared (NIR) spectroscopy measurements of 66 samples (22 batches) of CSL were analyzed by partial least-squares regression using several spectral preprocessing methods. Multivariate models developed in the NIR area showed good predictive abilities for DM, TA, TS, TRS, TFAA, TN, and TSu determination. These results confirm the feasibility of the multivariate spectroscopic approach as a replacement for expensive and time-consuming conventional chemical methods. Thus, a convenient and feasible method for the quality control of fermentation raw materials for food additives and fine chemicals, especially in CSL, is established.
authors: College of Pharmacy, Nankai University, Tianjin 300071, People's Republic of China.
authors: Xue
authors: X
authors: Xiao
authors: Yuanyuan
authors: Y
authors: Hou
authors: Jun
authors: J
authors: Du
authors: Yang
authors: Y
authors: Liu
authors: Yanjie
authors: Y
authors: Liu
authors: Linyi
authors: L
authors: Dong
authors: Qionglin
authors: Q
authors: Liang
authors: Yiming
authors: Y
authors: Wang
authors: Gang
authors: G
authors: Bai
authors: Guoan
authors: G
authors: Luo
mesh_terms: D000596:Amino Acids / Q000032:analysis; D002241:Carbohydrates / Q000032:analysis; D005285:Fermentation; D005503:Food Additives / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D016018:Least-Squares Analysis; D009584:Nitrogen / Q000032:analysis; D009753:Nutritive Value; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D013447:Sulfites / Q000032:analysis; D003313:Zea mays / Q000737:chemistry*
chemical_list: D000596:Amino Acids; D002241:Carbohydrates; D005503:Food Additives; D013447:Sulfites; D009584:Nitrogen