A water sample dilution system and method for expanding the range of online water quality detection

Abstract

The invention belongs to the technical field of water quality detection analysis and discloses a water sample diluting system and a water sample diluting method capable of enlarging on-line water quality detection range. The system comprises an overflowing bottle, a sampling pump, a diluting water pump, a tee joint, a mixing unit, a mixing pump and a control unit; water samples are diluted according to the proportion by controlling the operating time of the sampling pump and the diluting water pump, the water samples are mixed by the mixing pump, the mixed water sample is discharged after measurement, and the system automatically amplifies the diluting times when the measuring result still exceeds the detection limit after dilution is conducted according to certain times. The diluting times of the water sample is from several times to several tens of times, so that the high-concentration water sample can be diluted rapidly and accurately on line, the on-line water quality detection range is enlarged, the diluting times can be switched automatically, manual intervention is less and the automation degree is high.

Description

technical field [0001] The invention belongs to the technical field of water quality detection and analysis, and in particular relates to a water sample dilution system and method suitable for on-line analysis of high-concentration water quality indicators. Background technique [0002] Due to the limitations of the measurement range of water quality detection and analysis methods, the measurement range of water quality online detection instruments is limited. Online detection instruments cannot meet the needs to a certain extent. [0003] Due to technical limitations, the water quality indicators of high-concentration water samples cannot be directly measured. The conventional method is to use dilution equipment to dilute the high-concentration water samples measured, that is, to accurately measure a certain amount of high-concentration water samples according to the dilution multiple, and then Accurately measure a certain amount of distilled water and mix it to reduce the...

AI Technical Summary

Problems solved by technology

[0002] Due to the limitations of the measurement range of water quality detection and analysis methods, the measurement range of water quality online detection instruments is limited. On-line detection instruments cannot meet the needs to a certain extent

[0003] Due to technical limitations, the water quality indicators of high-concentration water samples cannot be directly measured. The conventional method is to use dilution equipment to dilute the high-concentration water samples measured, that is, to accurately measure a certain amount of high-concentration water samples according to the dilution multiple, and then Accurately measure a certain amount of distilled water and mix it to reduce the concentration to within the detection limit of the instrument. The invention patent CN102778383B discloses a solution automatic dilution equipment. This equipment is used as a pretreatment unit before liquid analysis. The water is injected into the dilution container separately, and the mixed water sample is taken out after mixing evenly for measurement. This method requires a large amount of dilution water, and increases the cycle of water quality analysis and measurement, and the steps are cumbersome.

Images