SY sulfuric acid analyzer centrifuge tube

SY sulfuric acid analyzer centrifuge tubeUsage: For the determination of sulfuric acid in electroplating solutions, commonly used methods include barium sulfate gravimetric method, sulfuric acid precipitation EDTA sodium (ethylammonium tetraacetate) volumetric method, barium sulfate dry weight method, and barium sulfate centrifugal precipitation method. Electroplating centrifuge tube is specifically used for determining the content of sulfuric acid in electroplating solution by centrifugal precipitation method.

Specifications:

The material is high borosilicate glass, with a bottom thin tube capacity of 0.3ml, and a total of 30 scale lines are engraved; The total length (excluding plug) is 129mm, and the large tube part (excluding grinding mouth and thin tube part) has a total length of 60mm and an outer diameter of 32mm. It is a round necked cylindrical glass tube, and the lower end of the tube gradually shrinks and is connected to a capillary glass tube with a scale. Round neck, convenient for inserting rubber plugs. Scale capillary glass tube for accurate measurement.

SY sulfuric acid analyzer centrifuge tubePrinciple:

Use barium chloride to generate barium sulfate precipitate from sulfate ions in the electroplating solution. After centrifugal precipitation in the electroplating centrifuge tube, calculate the content of sulfate ions based on the volume of the precipitate. The rotational speed of a centrifuge is closely related to the volume of sediment, so the rotational speed must be constant. Use a pipette to transfer 20mL of electroplating solution into a precipitation tube, add 5mL of hydrochloric acid with a volume ratio of 3:1 (hydrochloric acid is added to the solution to prevent the formation of barium chromate precipitate), stir well, add 5mL of barium chloride with a mass fraction of 25%, plug it tightly with a rubber stopper, shake for about 0.5min to 1min, place it in a centrifuge sleeve and let it stand for 5 minutes before use, add 35mL of water to another tube and place it in another centrifuge sleeve (maintain balance between the two tubes), turn on the centrifuge, rotate at a speed of 400 revolutions per minute for 1 minute, take out the centrifuge tube, gently tap the centrifuge tube to lower the sediment adsorbed on the wall, let it stand for 2-3 minutes, continue to start the centrifuge for about 15 minutes, take out the centrifuge tube, and place it in the centrifuge sleeve. Leave it on the shelf for a moment and read the sediment readings.