Rapid Determination of Chemical Components in Interstitial Water of Lake Sediments Using Near-Infrared Spectroscopy
HUO Shou-liang1, ZAN Feng-yu1,2, XI Bei-dou1*, ZHANG Jing-tian1, LI Qing-qin1, HE Lian-sheng1
1. Chinese Research Academy of Environment Sciences, Beijing 100012, China 2. School of Environment Science, Anhui Normal University, Wuhu 241000, China
Abstract：The near infrared reflectance spectra (NIRS) of interstitial water samples of lake sediments in Chaohu lake were determined by near-infrared reflectance spectrometry. The respective near NIRS calibration models for predicting total nitrogen (TN), total organic carbon (TOC), phosphorus (PO3-3), ammonia nitrogen(NH3-N) and silicate(SiO-3) were built using partial least squares (PLS) algorithm with two spectral pretreatment tools including, wavelet compression combining orthogonal signal correction (OSC) and orthogonal signal correction (OSC) combining wavelet compression. The correlation coefficients between measured values and predicted values in calibration set for TN, NH3-N, PO3-3, TOC and SiO-3 were 0.975, 0.989, 0.937, 0.862 and 0.888, respectively. RMSEC(root mean square error of the calibration)for TN, NH3-N, PO3-3, TOC and SiO-3 were 0.353, 0.238, 0.031 3, 2.005 and 2.674 mg·L-1, respectively. The correlation coefficients between measured values and predicted values in validation set for TN, NH3-N, PO3-3, TOC and SiO-3 were 0.912, 0.918, 0.773, 0.337 and 0.856, respectively. RMSEP(root mean square error of the prediction)for TN, NH3-N, PO3-3, TOC and SiO-3 were 1.424, 0.945, 0.081, 7.866 and 4.273 mg·L-1, respectively.
霍守亮1，昝逢宇1,2，席北斗1*，张靖天1，李青芹1，何连生1 . 基于近红外光谱法的沉积物间隙水化学组分快速测量[J]. 光谱学与光谱分析, 2011, 31(01): 105-108.
HUO Shou-liang1, ZAN Feng-yu1,2, XI Bei-dou1*, ZHANG Jing-tian1, LI Qing-qin1, HE Lian-sheng1 . Rapid Determination of Chemical Components in Interstitial Water of Lake Sediments Using Near-Infrared Spectroscopy . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(01): 105-108.
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