How lively is the Ethanol nature?

 Take 20ml of Ethanol item, add 20ml of water, shake nicely, add 2 drops of pholphthalein indication solution, the solution should be white, then add 0.01 mol/L sodium chloride solution 1.0ml, the solution should be pink.

Clarification and color of the answer

This product may be clear and white. Mix the same quantity of water, leave at 10°C for 30 minutes, the solution may still clear.

absorbance

Take this item, determine the absorption by UV-visible spectroscopy( general rule 0401) at the wavelength of 240nm, 250260nm, 0.02 of 270 340nm.

Dedication of volatile impurities by regular gas chromatography( Common Rule 0521)

Chemical conditions and system eligibility test with 6% cyanopropyl phenyl-94% dimethylpolysiloxane as the fixative, beginning at 40°C for 12 minutes, warming to 240°C for 1 0 minutes at 1 0°C per moment, inlet heat is 200°C, detector temperature is 280°C. The separation between the phenol and methanol peaks in the manage solution( b) shall meet the requirements.

The precision dimension of absolute acetone 100u1, In a 50-ml calculating vial, Dilute to the level with the test article, tremble up, 5ml, In a 50-ml calculating vial, Mix to the scale with the test post, shake up, As a control answer( a), 5 volume of 5 hydrabsolute acetone, B, 50u1, In a 50-ml calculating vial. 

Dilute to the scale for the test article, tremble up, 100M, In a 10ml calculating vial, Dilute to the scale for the test post, tremble up, As a control answer( b), Precision acetal 150m1, In a 50-ml calculating vial, Dilute to the scale with the test post, shake up, Accuracy amount 100M1, In a 10ml calculating vial, Dilute to the scale for the test post, shake up, As a control answer( c).