Decolorization experiment of veterinary syringe

Decolorization experiment of veterinary syringe:

dial a dose syringe

(Suitable for coloring needles) Take a proper amount of this product, cut three portions of the needle surface area of 50 cm2 (based on the inner surface area), and cut into 2cm × 0.3cm

The small pieces are placed in three conical flasks with stoppers, and 4% acetic acid solution (60 ℃ ± 2 ℃), 65% ethanol (25 ℃ ± 2 ℃),

After n-hexane (25 ° C ± 2 ° C) constant temperature in a water bath for 2 hours, take it out and let it cool to room temperature, using the same batch of 4% acetic acid solution, 65% ethanol, n-hexane as

Blank liquid, soaking liquid color should not be darker than blank liquid.