Boron Trifluoride Acetonitrile Complex Solution CAS 420-16-6 BF3 ≥19.0%

1 Characteristics
This product is colorless or light yellow transparent liquid.
2 Identification (should be positive)
The sample was 1.0ml placed in 100 bottle, water was added to the scale and tested on the gas chromatograph. The main peak retention time of the sample should be consistent with that of the acetonitrile control product.
3 Color (≤Y2#)
Take a sample of 10ml, and compare it with the yellow No. 2 standard colourometric solution QM04015-00(Operating procedures for color inspection).
4 Iron ion content (≤3ppm)
Take 1g of this product, and then dilute it with water to make 25ml, check according to QM04008-00 (Operation procedure for determination of iron salt) method, and compare with the control solution made of standard iron solution 0.3ml, not deeper.
5 Moisture: (≤0.5%)
5.1 Reagents and solutions
Karl Fischer's reagent
5.2 Instruments and devices
KF-1 moisture tester
5.3 Operation Methods
Take a dry moisture measurement bottle, weigh an appropriate amount of sample (about 1.0g) into the titration cup, record the corresponding weight, respectively measured twice, according to the moisture measurement operating procedures method to determine the moisture.
5.4 Data Processing
Take the secondary water value and calculate it on average. If the parallel standard deviation of the secondary data is greater than 0.3%, a retest should be conducted
6 Content determination (≥19.0%)
6.1 Instruments and appliances: analytical balance, 100ml stopper triangle bottle, 60ml drop bottle, oven.
6.2 Reagent: Sodium fluoride.
6.3 Determination method: Weigh and analyze about 5g of pure sodium fluoride and place them in two 100ml stopper triangle bottles, respectively, in an oven at 120℃ for about 2 hours (remove the stopper when drying). Remove and cool in the dryer, accurately weigh m1. Using a 60ml drop bottle sample, the sample was weighed by subtractive method of about 1.0g (about 1.2ml) and accurately weighed m. Drop into the triangular bottle, shake well, and place at 30-40℃ for 10min(be sure to plug the bottle). Then put the triangle bottle in the oven at 140℃ for 2 hours, take it out and cool it in the dry, and then accurately weigh m2.
3.4 Calculation formula:
BF3%= (m2-m1)/m ×100%
Where: m1 is sodium fluoride and total amount g of triangle bottle
m2 is the total amount of boron trifluoride, sodium fluoride and triangle bottle g
m is the sample mass g
6.5 Allowable Error
The relative deviation must not exceed 0.3%