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YBB60452012 English PDF (YBB60452012)

YBB60452012 English PDF (YBB60452012)

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YBB60452012: Tests for Hydrolytic Resistance of Glass Grains at 121 Degree C

This method is suitable for titration determination and grading of water resistance of various medicinal glass materials.
YBB 60452012
YBB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
Tests for hydrolytic resistance of glass grains at 121 ??C
Tests for hydrolytic resistance of glass grains at 121 ??C
This method is suitable for titration determination and grading of water resistance of various medicinal glass materials.
This method is a material testing method. Take a certain amount of glass grains of a specified size. Place them in a specified container. Add a specified amount of water. Heat them under specified conditions. Determine the degree of erosion of the glass grain by titrating the leaching solution. Grade it.
Instruments: High-pressure steam sterilizer, conical flask, beaker (Note: New flasks and beakers must be subject to aging treatment, that is, add an appropriate amount of water to the flasks and beakers; process them repeatedly according to the hot-pressing conditions specified in the test steps; it can be used only after the water is neutral to methyl red), oven, hammer, mortar and pestle made of quenched steel (see Figure 1), a set of stainless steel screens (including screen A: pore size 425 ??m, screen B: pore size 300 ??m , O screen: pore size 600 ~ 1000 ??m).
Figure 1 -- Mortar and pestle
Test product: Crush the test product into pieces. Put an appropriate amount into the mortar. Insert the pestle. Use a hammer to hit the pestle only once. Transfer the glass in the mortar to the O sieve on the upper layer of the sieve set. Repeat the above operation process. Use a

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