What are the types of refrigeration systems for high and low temperature test chambers
Time of Update: 2022-09-07
As an industrial accessory product, the cost of liquid nitrogen is getting lower and lower, so liquid nitrogen refrigeration technology is gradually being applied to the required high cooling rate and ultra-low temperature environmental testing equipment .
Product performance and production principle of p-nitrophenol
Time of Update: 2021-08-16
After the reaction reaches the end point, the material is cooled to 120°C and transferred to a crystallization pot filled with 50L of concentrated sulfuric acid and 600L of water .
Two Tikkurila paints failed spot check, volatile organic compounds increase indoor pollution
Time of Update: 2021-05-01
A few days ago, the Shenzhen Municipal Market Supervision Administration issued an announcement, disclosing the results of the quality supervision and random inspection of coating products sold in small stores in Shenzhen in 2017.
Cleaning and maintenance of three gas chromatography detectors
Time of Update: 2020-11-24
related topics During the operation of chromatography, the detector is sometimes contaminated by the fixed phase loss and the high boiling point components, easy decomposition and corrosive substa
Paint knowledge: does latex paint contain formaldehyde
Time of Update: 2020-04-03
Core tip: latex paint mainly contains benzene series, high-end brand latex paint content is much less At the same time, because the emulsion paint is used on the wall surface, so the benzene inside is
Complete selection of rotary evaporator
Time of Update: 2018-10-27
What are the important performance indexes of rotary evaporator? The selection of rotary evaporator is important for the air tightness of the instrument, which is related to the normal use of the inst