操操操影院_在线观看三级网站_亚洲一区在线播放_日韩视频一区_欧美a级成人淫片免费看_成人免费视频网址

Yetuo HCA-101 COD Dissolver (Aluminum Block)

model: HCA-101

Product Overview:

COD reflux digester adopts glass burr reflux tube instead of spherical reflux tube, and uses air cooling technology instead of tap water cooling method. The cooling part is mainly completed by a burr condenser tube and a fan. The upper part of the condenser tube is spherical, and the catalyst is added from here to prevent the instantaneous evaporation of light components in the sample. The lower part is "burr" shaped, with two opposing spherical condenser tubes extending from the condenser tube wall on a plane. In addition, the dual effect of cooling water in the upper spherical reflux tube and the fan inside the machine ensures the reflux cooling of the sample.

This instrument strictly follows the determination steps specified in the national environmental protection department's standard analysis method "HJ 828-2017 Determination of Chemical Oxygen Demand (COD) in Water Quality - Dichromate Method (replacing GB 11914-89)", which specifies the conditions and indicators of the method, such as heating digestion time, solution acidity, oxidant and catalyst dosage. Following the basic principles of international standards (ISO) and national standards (GB), ensure the digestion operation of reflux heating and micro boiling for 2 hours, and prepare and add reagent solutions in accordance with the national environmental protection department's "HJ828-2017" dichromate method to ensure reliable and accurate analysis results.

Product features of Yetuo HCA-101 COD digestion instrument (aluminum block):

The number of two opposing spherical condensation bubbles extending from the condenser wall has increased to three cold bubbles, ensuring an improved condensation effect

● Automatically heat up to the set temperature, time digestion reflux, automatically stop heating, continue working of the cooling fan, assist in sample cooling

● Increase from 5 samples to multiple samples, 250ML flat bottomed triangular flask with dual heating, good bottom contact, and uniform heating. And it is convenient to operate sampling in dual channel mode

The new glass burr reflux tube and heat dissipation system ensure the accuracy of sample digestion results due to their excellent digestion reflux effect

Air cooling replaces the previous circulating water cooling, and the power and position of the fan are very important. Based on years of operating experience, improvements have been made, and high-quality domestic fans with reliable quality have been selected

The heating plate adopts a strip heating wire, which has a long service life. Uniform and consistent heating ensures the parallelism of sample digestion