Determination of Trace Methanol in Industrial Ethylene and Propylene-Gas Chromatography (2
Time of Update: 2021-12-14
1 Sampling device: inject the gaseous sample with a gas injection valve; inject the water absorption liquid with a micro-syringe .
2. 3 Aging of the chromatographic column Aging for 12 to 16 hours at 120°C, the carrier gas and flow rate used are the same as those during the analysis .
In the next 5 years, China will focus on the development of environmentally friendly and energy-saving adhesives
Time of Update: 2021-11-18
Global Coatings Network News: Global Coatings Network News: In recent years, while the output of acrylic water-based adhesives has increased, the product quality has also been continuously improved, and the variety has increased.
China Coatings Association Yang Yuande: Water-based coatings have policy support
Time of Update: 2021-09-06
Yang Yuande, Secretary-General of the China Coatings Association, said: In the past two years, the Ministry of Industry and Information Technology has clearly stipulated that some paints must be water-based paints for passenger car paints, and the "Air Pollution Prevention Law" clearly stipulates the development of environmentally friendly paints.
Recommended: The preparation of commonly used solutions in the laboratory
Time of Update: 2020-10-23
(4)5.6% NaHCO3 solution said NaHCO35.6 g, dissolved in 100ml distilled water, stored at room temperature (if required can also be 10 pounds 15 minutes autocultension, 4 degrees C refrigerator storage) (5)10 sg/ml autumn daffodils autumn daffodils lOmg physiological saline 100ml is packed in a tea-colored bottle for storage fluid and stored in a refrigerator at 4C.
Breakthrough in China EU Water Buffalo project in Yingjiang, Yunnan Province
Time of Update: 2001-11-14
Introduction: the flume River livestock farm in Yingjiang County, Dehong Dai Jingpo Autonomous Prefecture, which is located at the border of China and Myanmar, has recently received encouraging news: