Title:
WATER SAMPLE HARDNESS MEASUREMENT METHOD BASED ON WATER SAMPLE TURBIDITY CHANGE
Document Type and Number:
WIPO Patent Application WO/2023/010803
Kind Code:
A1
Abstract:
A water sample hardness measurement method based on a water sample turbidity change, comprising the following steps: S1, constructing a mathematical model related to water hardness and water turbidity; S2, enabling a water sample to be in contact with a calcium/magnesium ion precipitant to convert calcium ions and magnesium ions in the water sample into insoluble salts, and measuring the water sample turbidity of the water sample; and S3. substituting the water sample turbidity for the water turbidity in the mathematical model to calculate the hardness of the water sample. According to the method, the characteristic that the calcium ions and the magnesium ions can be converted into the insoluble salts that are insoluble in water is used, the calcium/magnesium ion precipitant is introduced to convert the calcium ions and magnesium ions into the insoluble salts, such that the turbidity of the water sample changes significantly, and the reaction phenomenon in the process is obvious, the test accuracy is high, and a hardness value of the water sample can be quickly and accurately obtained without tedious pre-calibration or expensive instruments.
Inventors:
LV SU (CN)
DONG HONGCHEN (CN)
CHEN RU (CN)
YAN BO (CN)
DONG HONGCHEN (CN)
CHEN RU (CN)
YAN BO (CN)
Application Number:
PCT/CN2022/070084
Publication Date:
February 09, 2023
Filing Date:
January 04, 2022
Export Citation:
Assignee:
FOSHAN VIOMI ELECTRICAL TECH CO LTD (CN)
International Classes:
G01N33/18
Foreign References:
| CN107764819A | 2018-03-06 | |||
| CN107870154A | 2018-04-03 | |||
| CN101078717A | 2007-11-28 | |||
| US4626992A | 1986-12-02 | |||
| JP2002253904A | 2002-09-10 |
Other References:
LIU JINHUI, YUAN QINGZHONG: "Study on Analytical Method for Determination of Calcium Ion by Photoelectric Turbidimetry", PHYSICAL TESTING AND CHEMICAL ANALYSIS PART B CHEMICAL ANALYSIS, vol. 35, no. 8, 31 August 1999 (1999-08-31), pages 372 - 373, XP093031349
"Analytical Chemistry Experiment Course", 31 July 2019, CHINA MEDICAL SCIENCE AND TECHNOLOGY PRESS, CN, ISBN: 978-7-5214-0937-6, article LI, QIUPING ET AL.: "Passage; Analytical Chemistry Experiment Course", pages: 70, XP009543512
"Analytical Chemistry Experiment Course", 31 July 2019, CHINA MEDICAL SCIENCE AND TECHNOLOGY PRESS, CN, ISBN: 978-7-5214-0937-6, article LI, QIUPING ET AL.: "Passage; Analytical Chemistry Experiment Course", pages: 70, XP009543512
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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