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Scheme based on near infrared technology and used for detecting phosphorous in water

A near-infrared and water quality technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as errors, sample damage, and sample reagents that cannot be restored

Inactive Publication Date: 2015-11-25
JIANGNAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The traditional method will use chemical reagents in the measurement process, which will cause damage to the sample itself. At the same time, it will also bring errors. The sample reagents cannot be restored after the measurement, let alone restored to the original system.

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  • Scheme based on near infrared technology and used for detecting phosphorous in water
  • Scheme based on near infrared technology and used for detecting phosphorous in water

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific drawings.

[0016] Such as figure 1 The basic composition of Fourier transform infrared spectroscopy instrument includes the following five parts:

[0017] ①Analyze the light emission system. The system is composed of light source, beam splitter, sample, etc., and collects analysis light carrying sample information.

[0018] ②Interferometer. This instrument is the core component, and its quality directly affects the processing effect of the entire instrument. The traditionally used interferometer, the Michelson interferometer, and an improved interferometer. Their working principle is to divide the light beam emitted by the analysis light transmitter into two beams to form an optical path difference, thereby generating the analysis light expressed in the space or time domain, that is, interference light.

[0019] The Michelson interferometer system consists of two plane mirrors at 90 degree an...

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Abstract

Disclosed is a scheme based on near infrared technology and used for detecting phosphorous in water. The scheme includes: utilizing near infrared spectroscopy to measure 0mg / L-50mg / L of phosphorous solutions different in concentration by utilizing NIR equipment to acquire spectra, and storing the spectra as CSV data; utilizing TQ analyst for primary analysis; utilizing a derivative algorithm (Derivatives norris gap), a multiplicative scatter correction (Multiplicative scatter correction, MSC) algorithm, a smoothing (Smoothing) algorithm and a standard normal variate transformation (Standard normal variate transformation, SNV) method to pre-process near infrared spectrum data respectively; utilizing MATLAB for simulation, selecting a simulation model PLSR, utilizing a concentration gradient classifying method for simulation, and building a mathematic model; acquiring simulation results, optimizing the same, and integrating to acquire a final result. By the scheme, quick, environment-friendly, nondestructive and online detection of the phosphorous solutions different in concentration can be realized.

Description

Technical field [0001] The invention relates to a detection of phosphorus in water quality based on near infrared technology, and belongs to the field of chemical detection and analysis. Background technique [0002] There are a total of 968 state-controlled surface water monitoring sections (points) in 423 major rivers and 62 key lakes (reservoirs) across the country. The water quality of these sections is monitored, and the water quality is inferior to Grade Ⅰ, Ⅱ, Ⅲ, Ⅳ, and Ⅴ. They accounted for 3.4%, 30.4%, 29.3%, 20.9%, 6.8%, and 9.2% respectively. One of the main pollution indicators is total phosphorus. [0003] In spring, summer and autumn, the areas of China’s entire seas that are inferior to the fourth-class seawater quality standards are 52,280 square kilometers, 41,140 square kilometers, and 57,360 square kilometers, respectively. Among them, there are 301 countries in the coastal waters of the country. The monitoring data of the control monitoring points show that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N21/3577
Inventor 尹燕燕张世勤刘燕卿
Owner JIANGNAN UNIV
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