According to Chemical Standard HG/T 2765.5-2005 , the PH Value of the silica gel desiccant (type A) should meet the standard requirement between 4 to 8 . In order to prove that our silica gel desiccant quality , we hadcarried out a test in the Lab.
A:Steps:
1. Take out several SILICA GEL ( type A) , 2-4mm, water content <3%
Take out several SILICA GEL ( type A) ,2-4mm, water content <5%
Take out several orange silica gel , 2-4mm
Take out several blue silica gel , 1-3mm
2. Take A PH meter , before using the meter, calibrate it under the buffer solution.
3. According to Standard HG/T 2765.5-2005, silica gel desiccant testing method ,article 13 .
B: Testing Result of transparent silica gel bead .( Temperature =25℃, RH=50%)
| Item No. | PH value of silica gel desiccant( water content <3%) | PH value of silica gel desiccant( water content <5%) |
| 1 | 4.7 | 4.2 |
| 2 | 4.8 | 4.3 |
| 3 | 4.6 | 4.2 |
C: Testing Result of indicating silica gel ( Temperature =25℃, RH=50%)
| Item No. | indicating silica gel (orange) | indicating silica gel (blue) |
| 1 | 2.0 | 6.3 |
| 2 | 2.0 | 6.6 |
| 3 | 2.1 | 6.4 |
