Method for improving detection accuracy of concentration of suspended particulates in water

Abstract

The invention discloses a method for improving the detection accuracy of the concentration of suspended particulates in water. The method comprises the following steps: immersing a 0.45 [mu]m hydrophilic filter membrane in a beaker containing a certain amount of ultrapure water, placing the ultrapure water wetted filter membrane in a weighing bottle by dressing flat-bit forceps a certain time later, taking off a bottle cap, transferring the filter membrane into an oven, drying the filter membrane at 103-105 DEG C for 0.5 h, taking out the filter membrane, placing the filter membrane in a drier, cooling the filter membrane to room temperature, and weighing the filter membrane; repeatedly drying, cooling and weighing the filter membrane until the weight is constant; performing suction filtration on 100 ml of a water sample containing suspended particulates by a suction filtration device; placing the suction filtered 0.45 [mu]m hydrophilic filter membrane in the weighing bottle, taking off the bottle cap, transferring the filter membrane into the oven, drying the filter membrane at 103-105 DEG C for 0.5 h, taking out the filter membrane, cooling the filter membrane to room temperature, and weighing the filter membrane; repeatedly drying, cooling and weighing the filter membrane until the weight is constant; and calculating the concentration of suspended particulates. The method has the characteristics of convenience, fastness, simplicity in operation, and high accuracy.

Description

technical field [0001] The invention relates to the technical field of environmental detection, in particular to a method for improving the measurement accuracy of suspended particulate matter concentration in water bodies. Background technique [0002] Suspended particulate matter in water is an important substance transported by rivers. Due to its strong adsorption capacity for pollutants, it has an important impact on the transport and transformation of pollution. The amount of suspended particulate matter in water is an important factor affecting water quality. In many studies on suspended particulate matter, the concentration of suspended particulate matter is regarded as an important indicator of water quality. At present, domestic and foreign methods for measuring the concentration of suspended particulate matter in water mainly adopt the overlying water to pass through a 0.45 μm water system filter membrane, and obtain the concentration of particulate matter accordin...

AI Technical Summary

Problems solved by technology

However, in the actual operation process, there are often experimental errors such as the dry weight of the filter membrane after use is smaller than the dry weight before use, which has a huge impact on the accuracy of the measurement of suspended particulate matter concentration.

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