Measurement method of specific gravity using a pycnometer (geulusack type) (Refer to JIS K6920 attached book B)
2) Add the distilled water at 23 ± 0.1 ° C to the target line, and apply the mass (B) to the digit of 0.1m.
3) Next, the picknometer is dried, then a sample 1 to 5 g, and the mass (A) is calculated.
4) In addition to the sample covered by the sample in 3), the air in the distilled water is eliminated in the vacuum deskkator.
5) Add distilled water to the target line and put it in a constant temperature tank at 23 ± 0.1 ° C and leave it. 6) After adjusting the amount of distilled water so that the amount of distilled water is accurately becomes a sign of the picknometer, the mass (c) is 0.1m digit, and the next equation is the specific gravity S. Calculate (23/4 ° C). S = A × D/(B-C+A) A: Mass of sample (g) B: Mass when distilled water is inserted to the picnometer mark (g) C: Pycnometer mark with sample Mass when distilled water is filled up (g) D: specific gravity of distilled water at 23 ° C (0.99756)