title: Application of Near Infrared Spectroscopy Coupled with Fluidized Bed Enrichment and Chemometrics to Detect Low Concentration of β-Naphthalenesulfonic Acid.
abstract: A fluidized bed enrichment technique was developed to improve sensitivity of near infrared (NIR) spectroscopy with features of rapidness and large volume solution. D301 resin was used as an adsorption material to preconcentrate β-naphthalenesulfonic acid in solutions in a concentration range of 2.0-100.0 μg/mL, and NIR spectra were measured directly relative to the β-naphthalenesulfonic acid adsorbed on the material. An improved partial least squares (PLS) model was attained with the aid of multiplicative scatter correction pretreatment and stability competitive adaptive reweighted sampling wavenumber selection method. The root mean square error of cross validation was 1.87 μg/mL at PLS factor of 7. An independent test set was used to assess the model, with the relative error (RE) in an acceptable range of 0.46 to 10.03% and mean RE of 3.72%. This study confirmed the viability of the proposed method for the measurement of a low content of β-naphthalenesulfonic acid in water.
authors: Shanghai Key Laboratory of Functional Materials Chemistry; and Research Center of Analysis and Test, East China University of Science and Technology, Meilong Rd 130, Shanghai 200237, People's Republic of China.
authors: Wei
authors: W
authors: Li
authors: Xuan
authors: X
authors: Zhang
authors: Kaiyi
authors: K
authors: Zheng
authors: Yiping
authors: Y
authors: Du
authors: Peng
authors: P
authors: Cap
authors: Tao
authors: T
authors: Sui
authors: Jinpei
authors: J
authors: Geng
mesh_terms: D004785:Environmental Pollutants / Q000737:chemistry; D009282:Naphthalenesulfonates / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D019265:Spectroscopy, Near-Infrared; D013997:Time Factors
chemical_list: D004785:Environmental Pollutants; D009282:Naphthalenesulfonates; C534215:2-naphthalenesulfonic acid