Method for directly filtering solution

Abstract

The invention relates to a method for directly filtering a solution. According to the technical scheme, one plastic straight pipe with the diameter ranging from 5 mm to 10 mm and the length ranging from 150 mm to 250 mm is taken and divided into a long-section plastic straight pipe and a short-section plastic straight pipe, and the length of the short-section plastic straight pipe ranges from 4 mmto 6 mm. One end of the long-section plastic straight pipe is filled with degreasing cotton, the filling length of the degreasing cotton ranges from 5 mm to 7 mm, and a small number of degreasing cotton silk heads are reserved after filling. The reserved degreasing cotton silk heads are uniformly wrapped on an outer surface of the long-section plastic straight pipe, and the degreasing cotton silkheads on the outer surface of the long-section plastic straight pipe are pressed by using the short-section plastic straight pipe such that the degreasing cotton is fixed, and a filtering solution sample injection pipe is obtained. One end, with the degreasing cotton, of the filtering solution sample injection pipe is inserted into the bottom of the to-be-detected solution. When the solution is filtered into a to-be-filtered sample injection tube for 20-60 seconds, inserting a sample injection tube of an analytical instrument into the other end of the filtered solution sample injection tube,and the filtrate is sucked until the measurement of the to-be-measured solution is completed. The method has the characteristics of simplicity in operation, high analysis speed and small pollution.

Description

technical field [0001] The invention belongs to the technical field of filtering solutions. In particular, it relates to a method for directly filtering a solution. Background technique [0002] At present, techniques such as inductively coupled plasma atomic emission spectrometry (ICP-AES) analysis, inductively coupled plasma mass spectrometry (ICP-MS) analysis, flame atomic absorption spectrometry (FAAS) analysis and atomic fluorescence spectrometry analysis are widely used in the field of modern wet analysis. , the common features of these technologies are high sensitivity and fast solution injection measurement speed. The factors that restrict the analysis speed of the measurement method are the preparation of the measurement solution and the prevention of pollution during the preparation process. The specific operations of these analytical methods all involve solution sampling. The instrument sampling system consists of a sampling tube and an atomizer. The inner diamet...

AI Technical Summary

Problems solved by technology

This requires the use of a funnel and a container to receive the filtrate, thus increasing container contamination and filtration time

Even if the dry filtration operation described in the patented technology of "A Filtration Method for Chemical Analysis" (CN201910728821.X) is adopted, the risk of contamination of the filtrate will be increased

[0004] The technical defects of the above method are: 1. The filtration operation procedure is complicated; the analysis speed decreases when the filtration operation process is long; 3. Using more than one receiving vessel will increase the pollution