GB/T 34499.2-2017Methods for chemical analysis of iridium compounds - Part 2: Determination of silver, gold, platinum, palladium, rhodium, ruthenium, aluminium, copper, iron, nickel, lead, magnesium, manganese, tin, zinc, calcium, sodium, potassium, silicon content - Inductively coupled plasma atomic emission spectrometry (English PDF)

3.1

Potassium hydroxide.

3.2

Nitric acid (p = 1.42 g/mL).

3.3

Hydrochloric acid (p = 1.19 g/mL).

3.4

Hydrogen peroxide (30%, volume fraction).

3.5

Hydrochloric acid (1 1).

3.6

platinum standard stock solution Weigh 0.1000g metal platinum (mass fraction >= 99.99%), placed in 100mL Teflon beaker,

Add 6mL hydrochloric acid (3.3), 2mL nitric acid (3.2), cover the surface of the dish, low temperature heating to dissolve completely, into a 100mL volumetric flask, add

10mL hydrochloric acid (3.3), diluted with water to the mark. Mix well. This solution 1 mL contains 1.0 mg of platinum.

3.7

Palladium standard stock solution Weigh 0.1000g metal palladium (mass fraction >= 99.99%), placed in 100mL Teflon beaker,

Add 6mL hydrochloric acid (3.3), 2mL nitric acid (3.2), cover the surface of the dish, low temperature heating to dissolve completely, into a 100mL volumetric flask, add

10mL hydrochloric acid (3.3), diluted with water to the mark. Mix well. This solution 1 mL contains 1.0 mg of palladium.

3.8

rhodium standard stock solution Weigh 0.1000g rhodium powder (mass fraction >= 99.99%), placed in 50mL glass tube, add 8mL salt

Acid (3.3), 2mL hydrogen peroxide (3.4), sealed tube. Dissolved at 150 °C 48h, cooling, open tube. Pipette the test solution with hydrochloric acid (3.5) wash

100mL volumetric flask, diluted with water to the mark, mix well. 1 mL of this solution contains 1.0 mg of rhodium.

3.9

ruthenium standard stock solution Weigh 0.1000g ruthenium powder (mass fraction >= 99.99%), placed in a rigid glass tube sealed, added with ice water

The cooled 8mL hydrochloric acid (3.3), 2mL of hydrogen peroxide (3.4), immediately flame with a gasoline torch to melt the seal of rigid glass sealing tube and sealed,

Placed in a steel tube (two openings), and then placed in an oven warmed to 150 °C ± 5 °C, dissolved at constant temperature 72h. Remove, cool and cool in the freezer

Frozen 2h. Remove, immediately cut with a quartz sand hard glass sealed pipe nozzle, the tube test solution was washed with hydrochloric acid (3.5) into 100mL volumetric flask

In, dilute with water to the mark. Mix well. This solution 1 mL contains 1.0 mg of ruthenium.