Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Seawater total nitrogen and total phosphorus analysis method and system based on absorption spectrum characteristic peak area

A technology of absorption spectrum and characteristic peak, which is applied in the field of seawater total nitrogen and total phosphorus analysis and system based on the characteristic peak area of ​​absorption spectrum, can solve the problems of low detection limit and low detection accuracy of the instrument, and improve detection ability and detection accuracy , the effect of fast calculation speed

Active Publication Date: 2020-08-21
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low detection accuracy and lower detection limit of the instrument when the traditional single-wavelength and multi-wavelength methods measure seawater with low concentrations of total nitrogen and total phosphorus, the present invention aims at high-precision, high-real-time monitoring of total nitrogen in seawater. In order to meet the requirements of accuracy, a quantitative analysis method of total nitrogen and total phosphorus in seawater based on the characteristic peak area of ​​the absorption spectrum is proposed. Modeling is carried out by calculating the characteristic peak area of ​​the absorption spectrum, which can effectively increase the detection accuracy of the instrument while ensuring real-time performance. lower detection limit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Seawater total nitrogen and total phosphorus analysis method and system based on absorption spectrum characteristic peak area
  • Seawater total nitrogen and total phosphorus analysis method and system based on absorption spectrum characteristic peak area
  • Seawater total nitrogen and total phosphorus analysis method and system based on absorption spectrum characteristic peak area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as figure 1 , the method of the present invention mainly includes data acquisition, absorbance conversion, smoothing and filtering, feature position selection, feature peak area calculation, regression model and concentration data output.

[0046] The first step: data collection.

[0047] The UV-visible-near-infrared spectral curve of the measured water body and the spectral curve of artificial seawater are measured by a full-spectrum analysis module composed of a UV-visible-near-infrared fiber optic spectrometer and an LED light source. Figure 2a and 2b shown. The ultraviolet-visible-near-infrared spectral curve of the measured water body and the spectral curve data of artificial seawater are collected.

[0048] The second step: absorbance conversion.

[0049] Use the formula (1) to calculate the absorbance of the measured wa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a seawater total nitrogen and total phosphorus analysis method and system based on the absorption spectrum characteristic peak area. The problems of low detection precision and low instrument detection lower limit when a traditional single-wavelength and multi-wavelength method is used for measuring seawater with low total nitrogen and total phosphorus concentration are solved. The method mainly comprises seven parts of data acquisition, absorbance conversion, smooth filtering, characteristic position selection, characteristic peak area calculation, a regression modeland concentration data output, the available information amount of a weak absorbance signal close to the lower detection limit of the instrument can be amplified by utilizing the characteristic peak area, and the detection capability of the instrument when being close to the lower detection limit of the instrument can be improved.

Description

technical field [0001] The invention relates to a quantitative analysis method and system for total nitrogen and total phosphorus in seawater based on the characteristic peak area of ​​absorption spectrum. Background technique [0002] Seawater total nitrogen and total phosphorus is one of the important indicators reflecting the degree of seawater pollution and eutrophication. The online monitoring of total nitrogen and total phosphorus in seawater can provide long-term continuous real-time monitoring data for ecological monitoring and early warning of ecological disasters such as red tides and green tides, and improve the timeliness and accuracy of forecasts. [0003] The online monitoring technology of sea water quality based on absorption spectroscopy is a method based on the principle that specific substances in water absorb light of a specific wavelength, and indirectly measure water quality parameters by measuring the molecular absorption spectrum of substances. Since...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 刘嘉诚于涛王雪霁杜剑刘宏刘骁张周锋鱼卫星胡炳樑
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com