In the process of on-line monitoring of sewage, its accuracy is very important! So what methods should we use to evaluate the accuracy of water quality monitoring? This chapter water quality online monitoring instrument manufacturers will understand together with you!

The accuracy evaluation method can be used to evaluate the accuracy of analytical methods and measurement systems by measuring standard samples or by measuring the recovery rate of standard samples.

Standard sample analysis, it is by analyzing the standard sample, from the results obtained here to understand the accuracy of the analysis;

The recovery rate is measured by adding a quantitative standard substance to the sample to measure its recovery rate, but this is a common method to determine the accuracy in the laboratory, and the error problem of the method system can be found in the results of multiple recovery tests. Calculate the recovery rate P according to the following formula: recovery rate P (%) = (plus standard determination value – sample determination value)/plus scalar * 100%;

For the comparison of different methods, it is generally believed that it is very unlikely that the analytical methods of different principles have the same inaccuracy, but when the same sample is determined by different analytical methods of different principles and the consistent determination results are obtained, it can be used as an estimate of the true value. If the results obtained by different analytical methods are consistent for the important determination of the same sample, or the statistical test shows that the difference is not obvious, it can be considered that these methods have good accuracy, and the results show significant differences, then the recognized reliable method should prevail.

The above is a simple method to evaluate the accuracy of water quality monitoring with you. If you need to know about the water quality monitoring instrument, you can pay attention to Hangzhou Moody Technology!