Tester for anionic surfactant in water

Abstract

The invention relates to a tester for an anionic surfactant in water. The tester comprises a shell and a bottom plate positioned at the bottom of the shell, a turntable system is arranged on the bottom plate, a rotary tray for placing a plurality of sample cups is arranged on the turntable system, a mechanical arm capable of moving up and down is arranged above the rotary tray, and the mechanicalarm is provided with a liquid pumping pipe for pumping extracted chloroform extraction liquid and an injection cleaning pipe for injecting pure water to clean the sample cups. Full-automatic measurement of an anionic surfactant in the sample is achieved, the water sample extraction stability is guaranteed, organic reagents are completely and automatically added and waste liquid is collected in theextraction process, experimenters do not need to make contact with toxic organic reagents at all, the humanized design is met, the working efficiency of the experimenters is improved, and manpower iseffectively saved.

Description

technical field [0001] The invention relates to the field of anion testing devices in water, in particular to an anion surfactant measuring instrument in water. Background technique [0002] At present, the national standard method of "Determination of Anionic Surfactant in Water Quality Methylene Blue Spectrophotometric Method" (GB 7494-87) is mostly used to measure the content of anionic surfactant in water in the laboratory, and the anionic surfactant in water is automatically determined according to this method There are few and many problems in the instrument market: [0003] 1. Most of the products on the market for measuring anionic surfactants in water by this method are manual measuring instruments, that is, they can only perform spectrophotometric measurement of anionic surfactants, and cannot perform pretreatment of water samples. As a result, most of the time in the process of measuring the content of anionic surfactants requires artificial pretreatment of water...

AI Technical Summary

Problems solved by technology

[0003] 1. Most of the products on the market for measuring anionic surfactants in water by this method are manual measuring instruments, that is, they can only measure anionic surfactants by spectrophotometry, and cannot perform pretreatment of water samples

As a result, most of the time in the process of measuring the content of anionic surfactants requires artificial pretreatment of water samples. A large amount of organic reagents such as chloroform are used in the pretreatment of water samples, which seriously affects human health and has a risk of carcinogenicity.

And this process uses a separating funnel for manual extraction, resulting in poor stability of measurement results, time-consuming and labor-intensive

[0004] 2. There are some automated anionic surfactant measuring instruments in the market. The autosamplers mostly use a turntable type, the sample cup is fixed, and only one mechanical arm rotates to process different samples.

Thus limiting the number of samples in the autosampler

[0005] 3. Some automated anionic surfactant measuring instruments in the market use the method of flow injection, which is not completely in accordance with the national standard method "Determination of Anionic Surfactants in Water Quality Methylene Blue Spectrophotometric Method" (GB 7494-37)

[0006] 4. Some fully automated instruments in the market only have the washing process of the extractant, while omitting the process of constant volume of the extractant

[0007] 5. Some fully automated instruments in the market use split-type separation constant volume cups. This glassware is fragile and unsafe and reliable.

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