No-chemical monitoring and fast analysis on total nitrogen in water

LIU Hong-xin; ZHANG Jun; WANG Bo-guang; LU E

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No-chemical monitoring and fast analysis on total nitrogen in water

Article | 更新时间：2020-08-12

- No-chemical monitoring and fast analysis on total nitrogen in water
- Optics and Precision Engineering Vol. 17, Issue 3, Pages: 525-530(2009)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院研究生院北京,100039
  3. 暨南大学理工学院光电工程系,广东广州,510632
  4. 暨南大学理工学院环境工程系,广东广州,510632
- 作者简介：
- 基金信息：
- DOI：
  CLC： O613.61;O657.33
- Received：08 April 2008，
  
  Revised：22 July 2008，
  
  Published Online：25 March 2009，
  
  Published：25 March 2009
- 稿件说明：
移动端阅览
刘宏欣, 张军, 王伯光, 卢锷. 水中总氮的无损快速分析[J]. 光学精密工程, 2009,17(3): 525-530

LIU Hong-xin, ZHANG Jun, WANG Bo-guang, LU E. No-chemical monitoring and fast analysis on total nitrogen in water[J]. Editorial Office of Optics and Precision Engineering, 2009,17(3): 525-530
刘宏欣, 张军, 王伯光, 卢锷. 水中总氮的无损快速分析[J]. 光学精密工程, 2009,17(3): 525-530 DOI：

LIU Hong-xin, ZHANG Jun, WANG Bo-guang, LU E. No-chemical monitoring and fast analysis on total nitrogen in water[J]. Editorial Office of Optics and Precision Engineering, 2009,17(3): 525-530 DOI：

摘要

在空气背景下使用不同光程石英样品池(1、2、4 mm)采集了55个自然水样近红外光谱(NIRS)

并应用逐步多元线性回归(SMLR)和偏最小二乘(PLS)方法对水样的总氮(TN)含量进行回归分析

建立相应的定量分析模型。实验结果表明:样品池为1 mm时

模型的TN分析值与国标法得到的标准值相关性最高

达到0.97

在显著性水平＞0.05的条件下对近红外光谱分析法与国标法的测定结果进行

-检验

二者无显著差异。结果表明

使用近红外光谱分析法不需任何化学试剂

检测时间短

能够实现水样总氮指标的无损快速分析

并且可以为进一步开发研制总氮在线自动监测系统提供参考。

Abstract

The Near Infrared Spectroscopy (NIRS) of 55 natural water samples were collected by a PbS detector with 8 nm resolution at wavelengths from 400 nm to 2 500 nm in air background and three quartz sample cells in thickness of 1 mm

2 mm and 4 mm respectively were used to investigate the effect of different optical path difference. The nitrogen concentrations were measured by the Chinese National Standard Method (NSM)

and the value of TN is used as the standard. The calibration models of the NIRS were established with Stepwise Multiple Linear Regression (SMLR) and Partial Least-squares (PLS) to analyze the TN concentration. Experimental results show that the correlation coefficient of the calibration model is 0.97 when the sample cell is 1 mm

and the Root Mean Square Error of Cross Validation (RMSECV) is 0.490 mg/L. In order to validate the feasibility of the NIRS method for TN measurement of water

the results of the NIRS method and NSM method have been compared to each other by

-test. The experimental results demonstrate that there is no significant difference between the NIRS method and the NSM by

-test on the condition of the significance level greater than 0.05;The NIRS method is promising for detecting TN in waters and wastewaters. Moreover

because of the strong influence of the water absorbance

1 mm thickness sample cell is more suitable for near infrared spectral analysis of TN.

关键词

Keywords

references

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