GB/T 36592-2018Methods for chemical analysis of rhodium—Determination of platinum, ruthenium, iridium, palladium, gold, silver, copper, iron, nickel, aluminum, lead, manganese, magnesium, tin, zinc, silicon contents—Inductively coupled plasma mass spectrometry (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies platinum (Pt), ruthenium (Ru), iridium (Ir), palladium (Pd), gold (Au), silver (Ag), copper (Cu), iron (Fe), nickel (Ni) in rhodium powder, A method for measuring the amounts of aluminum (Al), lead (Pb), manganese (Mn), magnesium (Mg), tin (Sn), zinc (Zn), and silicon (Si).

This standard applies to the determination of platinum, ruthenium, iridium, palladium, gold, silver, copper, iron, nickel, aluminum, lead, manganese, magnesium, tin, zinc and silicon in rhodium powder. Element measurement The range is shown in Table 1.

2 Principle of the method

The sample was dissolved with hydrochloric acid-hydrogen peroxide, iron was used as the internal standard, and silicon was used as the internal standard. The co-location was determined in the collision/reaction mode.

The signal intensity (cps) of the prime; palladium, silver, lanthanum, aluminum, copper, nickel, magnesium, manganese, zinc with yttrium as the internal standard, tin with indium as the internal standard, bismuth, platinum, gold, lead and Internal standard, the cps value of its isotope is determined in normal working mode.

3 Reagents

3.1 Potassium hydroxide.

3.2 Potassium chlorate.

3.3 Nitric acid (rho=1.42g/mL), MOS grade.

3.4 Hydrochloric acid (rho=1.19g/mL), MOS grade.

3.5 Hydrogen peroxide (volume fraction 30%).

3.6 Mixed acid. Three units of hydrochloric acid (3.4) are mixed with one unit volume of nitric acid (3.3).

3.7 Silver standard storage solution. Weigh 0.1000g of metallic silver (mass fraction >=99.99%) and place it in a 100mL Teflon beaker. Add 2mL of nitric acid (3.3), dissolve at low temperature and dissolve completely, transfer to a 100mL volumetric flask, add 10mL of nitric acid (3.3), dilute with water to Scale. Mix well. 1 mL of this solution contained 1.0 mg of silver.

3.8 Palladium standard storage solution. Weigh 0.1000g of metal palladium (mass fraction >=99.99%) and place it in a 100mL Teflon beaker. Add 4mL mixed acid (3.6), dissolve completely at low temperature, transfer to a 100mL volumetric flask, add 10mL hydrochloric acid (3.4), dilute with water To the scale. Mix well. 1 mL of this solution contained 1.0 mg of palladium.

3.9 Platinum standard storage solution. Weigh 0.1000g of metal platinum (mass fraction >=99.99%) and place it in a 100mL Teflon beaker.