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The role of digestion tube in multi-parameter water quality analyzer

by:BOQU     2021-05-17


In the process of water quality testing, some parameters such as cod, total phosphorus, total nitrogen, total chromium, etc. are required to be heated and digested. Generally, colorimetric tubes are used after digestion. In this process, liquid handling and other operations are required. It is a challenge in terms of safety, operation and accuracy. Therefore, water quality monitoring workers urgently need to find a treatment method and color separation tube. So what is the function of the digestion tube in the multi-parameter water quality analyzer? If you don’t know, let’s take a look!

Digestion tube

The digestive tube is a 16mm standard, high-temperature resistant glass tube with a length of 100mm~150mm, a wall thickness of 1.0mm~1.2mm, and an open screw-sealed cap. The utility model has the characteristics of acid resistance, high-temperature resistance, compression resistance, burst resistance and the like. In the chemical analysis process, this kind of sealed tube is generally used for constant temperature heating and solution digestion, so it is called the digestive tube.

Colorimetric tube

The colorimetric tube is the primary instrument used in the visual test of the visual colorimetric analysis in chemical tests and can be used to roughly measure the concentration of the solution. In the colorimetric comparison, compare the colorimetric tube containing the solution to be tested with the colorimetric tube containing the standard solution in front of white paper with the same irradiance, and observe the color difference with the naked eye.

There is also a tube, standard and digestion tube, often used in conjunction with a photometer for color comparison, also called a colorimetric tube.

Digestion colorimetric integrated tube

In the chemical analysis, the detection process of cod, total phosphorus, total nitrogen, total chromium, etc. were analyzed. First, the digestion tube was analyzed, and then the colorimetric tube was used for colorimetric analysis, and the results were calculated. In this process, it is necessary to carry liquids and other operations. It is a challenge in terms of safety, operation and accuracy.

Therefore, water quality monitoring workers urgently need to find a treatment method and color separation tube. After conducting a lot of experiments and comparisons with Austrian technology, they finally found a way to eliminate colorimetric induction, which perfectly handled these problems. The dissolution of colorimetric integration management and colorimetric sharing has greatly satisfied the needs of testing.

The advantages of the digestion tube

The spectrophotometric solution container is composed of two kinds of cubes and colorimetric tubes. The method includes the following processes: firstly, digest the water sample with a digestion tube, and transport the solution to a test tube to measure the absorbance; and colorimetric tube spectrophotometry, that is, use the digestion tube colorimetric method to measure the absorbance in the colorimetric tube. Then transport the solution to the colorimetric tube;

A digestive colorimetric tube is a combination of the digestive tube and colorimetric tube. In the process of COD measurement, the digestion and colorimetric methods use one tube to complete all the processes. There is no need to replace the tube, which saves some operations and reduces the impact of manual errors. Ensure the safety of the operator (concentrated sulfuric acid and other chemical reagents) COD measurement solution The acid and potassium dichromate in the liquid are susceptible to strong acid and high toxicity during liquid handling.

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