For laboratory personnel engaged in testing chemical oxygen demand ( CODcr ): there are five major pain points!

First, the sample volume is large. The detection of chemical oxygen demand by chromium method is one of the daily inspection items of water quality monitoring units at all levels. It is no exaggeration to say that it is a daily routine.

Second: It takes a long time. At present, the commonly used standard for laboratory testing of chemical oxygen demand is HJ828-2017 . The water sample needs to be digested for 120 minutes, then cooled, titrated one by one, the endpoint is determined, and the results are calculated. This repetitive work every day is frustrating.

Third: Environmental pollution during the experiment. For example, the volatilization of sulfuric acid during the digestion process, the acid gas diffuses throughout the laboratory space during the digestion process, which is extremely harmful to laboratory personnel and objects.

Fourth: The test data has large errors. Due to the differences among various types of digesters in China, many of them have uneven digestion, which leads to large discrepancies in the test results and poor parallelism.

Fifth: Extreme waste of fresh water resources. Traditional COD digestion requires cooling with tap water. Since the detection time is too long, nearly 130 minutes, the tap water needs to be kept open during this period, resulting in a large amount of fresh water resources being wasted.

 Pain, pain, pain, but I have to do it? What can I do? What can I do?

After nearly three years of hard research and development by Jinan Shengtai Electronic Technology Co., Ltd., a magic tool that ends the five major pain points of detecting chemical oxygen demand has finally come out! Its invention realizes the full process and highly automated operation of detecting chemical oxygen demand in water. From automatic addition of reagents, automatic digestion, automatic cooling and reflux for 120 minutes , automatic titration, automatic identification of titration endpoint, automatic calculation of test results, automatic cleaning of condenser tubes, etc. ... Yes, that's right, all are automated.

Product advantages:

First: highly integrated all-in-one machine. That is: it integrates the host, control platform, and cooling system. The control platform and the host are designed in one piece. You can operate and monitor the entire process by moving a stool. Isn't it very convenient? And our artifact even saves the water chiller. We don't need it, we don't need it! Because it is an all-in-one machine, I'll tell you secretly that it still has a high-power built-in compressor, and the cooling effect is awesome! ! !

Second: more samples to be tested. The main unit can continuously test nearly 50 water samples in one batch, and supports adding water samples in the middle and continuous sampling.

Third: We operate in a modular way. That is, we can move 6 water samples continuously at one time, automatically add reagents, digest, cool, and titrate. There is no need to move and grab them one by one, which saves more time.

Fourth: and most importantly, it fully complies with standard procedures. It is exactly the same as the manual operation process, avoiding the embarrassment of non-standard instruments, but the process is fully automated;

Fifth: The data is accurate, accurate, accurate!!! It can measure high and low concentration samples at the same time, and can be transmitted without affecting each other. The parallelism and accuracy are all within the standard range.