Title:
INSTRUMENT AND METHOD FOR SIMULTANEOUSLY TESTING MOLECULAR WEIGHT DISTRIBUTION AND ORGANIC NITROGEN LEVEL OF WATER SAMPLE
Document Type and Number:
WIPO Patent Application WO/2019/218530
Kind Code:
A1
Abstract:
The present invention relates to an instrument and a method for simultaneously testing a molecular weight distribution and an organic nitrogen level of a water sample. The instrument comprises: a tail-end injection valve, a chromatographic column, a pressure relief valve, an acid-adding injection valve, an oxygen-adding injection valve, a helical tube for an acid-oxygen reaction, a CO2 remover, a UV digester, a second gas-water separator membrane, a buffer solution injection valve, a helical tube for a buffer solution reaction, a cadmium column, a chromogenic agent injection valve, a helical tube for a chromogenic agent reaction, and a UV detector, sequentially connected via a pipeline. The tail-end injection valve is for receiving a fluid phase and a sample. The second gas-water separator membrane is connected to an electrical conductivity-based CO2 detector. The UV detector and the electrical conductivity-based CO2 detector are connected to a data processing computer. The invention achieves simultaneous detection of TOC concentrations and DON concentrations of a sample under test in different molecular weight distribution intervals, thereby providing a reliable and convenient detection means in the field of water quality testing, applicable to water quality analysis of water coming into or out of a water plant, and detection and control of nitrogen-containing disinfection byproducts.
More Like This:
Inventors:
ZHANG WENJUN (CN)
LI LEI (CN)
LI LEI (CN)
Application Number:
PCT/CN2018/102945
Publication Date:
November 21, 2019
Filing Date:
August 29, 2018
Export Citation:
Assignee:
UNIV TONGJI (CN)
International Classes:
G01N21/33; G01N30/88; G01N30/02
Foreign References:
| CN108918746A | 2018-11-30 | |||
| CN104730266A | 2015-06-24 | |||
| JPH09281099A | 1997-10-31 | |||
| US20040043499A1 | 2004-03-04 | |||
| US20120178175A1 | 2012-07-12 |
Attorney, Agent or Firm:
SHANGHAI KESHENG INTELLECTUAL PROPERTY AGENCY LTD. (CN)
Download PDF:
Previous Patent: MOTION DETECTION CIRCUIT AND MOTION DETECTION METHOD APPLIED TO CIS
Next Patent: PIPE GALLERY ANTI-FLOATING DEVICE
Next Patent: PIPE GALLERY ANTI-FLOATING DEVICE