SONG Bo,ZHANG Shi-hong,YU De-zhao,et al.The Approximate True Turbidity Theory and Its Application in Low Turbidity Water Measurement[J].China Water & Wastewater,2020,36(14):146-152.
The Approximate True Turbidity Theory and Its Application in Low Turbidity Water Measurement
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
14
Page:
146-152
Column:
Date of publication:
2020-07-17
- Keywords:
- turbidity; apparent turbidity; approximate true turbidity; low turbidity water sample; zero turbidity; particle
- Abstract:
- For low turbidity water samples(turbidity<0.1 NTU), the test results of different instruments are significantly different, so how to obtain more objective test data is particularly important. Therefore, this paper first presented a new theory of the approximate true turbidity, and introduced its determination method. The approximate ture turbidity，also known as approaching to the true turbidity, refers to an infinite approach to turbidity caused only by suspended particles and colloids, that is, infinitely close to the true value of turbidity. These particles and colloids include: sand, clay, algae, organic matter, microbial organisms and so on. The approximate true turbidity can be obtained by subtracting the turbidity value of laboratory pure water (zero indication error) from the apparent turbidity. The biggest difference between approximate true turbidity and current turbidity concept is that the approximate true turbidity eliminates error of indication caused by light source, instrument optical path, detector type, system stray light, signal value calculation method, calibration verification method and other aspects. The result will be close to the true value of turbidity by eliminating the zero indication error. The concept of approximate true turbidity can effectively solve the problems of accurate measurement in the field of low turbidity.
Last Update:
2020-07-17