性饥渴的黄蓉与老汉

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Testing of mixing homogeneity of enamel equipment

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Enamel equipment needs to go through various tests, in the process of testing, we should do a good job in time records, not sloppy. The following is the mixed homogeneity detection. I hope to further understand its performance through this detection.
1、 Preparation
Add 50L purified water to enamel equipment, then add 300g sodium hydroxide, start stirring, stop stirring after 20 minutes, and detect pH value for standby.
2、 Sampling and testing
The alkali liquor is divided into three layers: upper, middle and lower layers. There are two points in each layer, with a total of six sampling points. Each time, the sampling position is the same. 100ml of each point is sampled to detect the pH value with a pH meter.
3、 Confirmation method
First, slowly add 100ml concentrated hydrochloric acid into 50L alkali solution, stir for 10 minutes, set the speed of enamel equipment to 150r / min, stop stirring, sample and detect pH, and confirm three times continuously. Discharge the lye to the remaining 2L, continue to slowly add 20ml concentrated hydrochloric acid into the lye, stir for 10 minutes, set the rotational speed at 150r / min, stop stirring, take samples to detect pH, and confirm three times continuously.
4、 Eligibility criteria
Statistical analysis of each group of data, RSD% acceptance range ≤ 1%.
Enamel equipment mixing homogeneity detection is related to the use of problems, will also determine the performance, we in the process of use, as long as we grasp the corresponding knowledge, then later use, can have a good effect.

性饥渴的黄蓉与老汉_男朋友像疯了一样要我_昨晚他怎么弄你

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