ROSH Certification
fecha:2011-05-18 16:35
estado:para resolver
pregunta:admin
it is: 100PPM
Test Standards: EN1122
Method:
a, the samples will be cut into small pieces beaker, add concentrated sulfuric acid, heating to the sample is completely dissolved,
b, the board removed the beaker from the heating, cooling, and then adding hydrogen peroxide
c, repeat step b, the reaction solution is no longer bubbling and clarification, to remove the beaker from the heating plate and cooling
d, the solution to the filtrate to support quantitative ionized water, and then the yard by i
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