Rapid detecting method of quality of n-butyl acetate
A technology of n-butyl acetate and a detection method, which is applied to measuring devices, chemical analysis by titration, material weighing, etc., can solve the problems of white and yellow products, time-consuming and labor-consuming, and undetectable, and achieve detection Fast speed, low cost and wide applicability
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Embodiment 1
[0014] A kind of rapid detection method of n-butyl acetate quality, comprises the following steps:
[0015] S1. In a balance with an accuracy of 0.01g, weigh 0.2 ± 0.02g calcium isooctanoate liquid (analytical pure) with a 250mL Erlenmeyer flask, and return the balance to zero;
[0016] S2. Use a pipette to pipette the n-butyl acetate to be detected and slowly add it dropwise to the conical flask. At the same time, shake the conical flask slowly to dissolve calcium isooctanoate in the n-butyl acetate to be detected, and observe the appearance of the mixed liquid change, stop adding the n-butyl acetate to be detected when the mixed liquid appears white turbid, and weigh and record the amount of n-butyl acetate to be detected;
[0017] S3, quality judgment, if the addition of n-butyl acetate to be detected is less than 20g, then the n-butyl acetate quality test is judged as unqualified, if the addition of n-butyl acetate to be detected is at 20-100g, then n-butyl acetate The qu...
Embodiment 2
[0019] Take a bottle of n-butyl acetate raw material for quality inspection, the detection method is: in a balance with an accuracy of 0.01g, weigh 0.2 ± 0.02g calcium isooctanoate liquid (analytical pure) with a 250mL conical flask, and reset the balance to zero; Use a pipette to pipette the n-butyl acetate to be detected and slowly add it dropwise to the conical flask, while slowly shaking the conical flask to dissolve calcium isooctanoate in the n-butyl acetate to be detected, and observe the appearance change of the mixed liquid. When the addition amount of n-butyl acetate to be detected is 150g (greater than 100g), the color of mixed solution still does not change, and then this bottle of n-butyl acetate quality test is judged as superior grade.
Embodiment 3
[0021] The n-butyl acetate in Example 2 was taken, and acetic acid was added dropwise therein to make the mass content of acetic acid reach 0.1%, which was used as the sample to be tested for quality detection. The detection method is: in a balance with an accuracy of 0.01g, weigh 0.2±0.02g calcium isooctanoate liquid (analytical pure) with a 250mL Erlenmeyer flask, and reset the balance to zero; pipette the sample to be tested and slowly Add it dropwise into the Erlenmeyer flask, while slowly shaking the Erlenmeyer flask to dissolve the calcium isooctanoate in the sample to be tested, observe the appearance change of the mixed liquid, stop adding the sample to be tested when the mixed liquid appears white turbid, and weigh the volume of the sample to be tested. The addition amount is 19g, and the quality test of this sample to be tested is judged as unqualified.
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