GB/T 14352.20-2021Methods for chemical analysis of tungsten ores and molybdenum ores—Part 20: Determination of niobium, tantalum, zirconium, hafnium and 15 rare earth elements content—Inductively coupled plasma mass spectrometry (English PDF)

Foreword

GB/T 14352 "Methods for Chemical Analysis of Tungsten Ore and Molybdenum Ore" has 22 parts, including 25 chemical analyses of 34 elements method.

---Part 1: Determination of tungsten content;

---Part 2: Determination of the amount of molybdenum;

---Part 3: Determination of copper content;

---Part 4: Determination of lead content;

---Part 5: Determination of zinc content;

---Part 6: Determination of cadmium content;

---Part 7: Determination of the amount of cobalt;

---Part 8: Determination of nickel content;

---Part 9: Determination of Sulfur Content;

---Part 10: Determination of arsenic content;

---Part 11: Determination of the amount of bismuth;

---Part 12: Determination of silver content;

---Part 13: Determination of tin content;

---Part 14: Determination of Gallium Content;

---Part 15: Determination of Germanium Content;

---Part 16: Determination of selenium content;

---Part 17: Determination of the amount of tellurium;

---Part 18: Determination of rhenium content;

---Part 19: Determination of bismuth, cadmium, cobalt, copper, iron, lithium, nickel, phosphorus, lead, strontium, vanadium and zinc content inductively coupled plasma atomic emission Spectroscopy;

---Part 20: Determination of niobium, tantalum, zirconium, hafnium and 15 rare earth elements by inductively coupled plasma mass spectrometry;

---Part 21: Determination of Arsenic Content Hydride Generation-Atomic Fluorescence Spectrometry;

--- Part 22: Determination of the amount of antimony hydride generation-atomic fluorescence spectrometry. This part is Part 20 of GB/T 14352.

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

1 Scope

This part of GB/T 14352 specifies the determination of niobium, tantalum, zirconium, hafnium and hafnium in tungsten ores and molybdenum ores by inductively coupled plasma mass spectrometry.

15 rare earth elements (yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium) content.

This part is applicable to niobium, tantalum, zirconium, hafnium and 15 rare earth elements (yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, Dysprosium, holmium, erbium, thulium, ytterbium, lutetium) content determination by inductively coupled plasma mass spectrometry.

The detection limits and measurement ranges of the elements in this section are shown in Table 1.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 14505 General rules and general regulations of rock and ore chemical analysis methods

3 Principle

The sample was melted and decomposed by sodium hydroxide-sodium peroxide, separated by water extraction and precipitation, acidified, and prepared into a sample solution. Use inductive coupling plasmon