GB/T 6150.2-2022

Methods for chemical analysis of tungsten concentrates—Part 2: Determination of tin content—Potassium iodate titrimetry and inductively coupled plasma atomic emission spectrometry (English Version)

Standard No.

GB/T 6150.2-2022

Language

Chinese, Available in English version

Release Date

2022

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 6150.2-2022

Replace

GB/T 6150.2-2008

Scope

This document specifies the methods for the determination of tin content in tungsten concentrates, including potassium iodate titration (method 1) and inductively coupled plasma atomic emission spectrometry (method 2). This document is applicable to the determination of tin content in tungsten concentrate, the determination range (mass fraction) of method 1: 1.00%~20.00%. The measurement range (mass fraction) of method 2: 0.010%~2.00%. For the overlapping part of the measurement range, method 2 shall be used as the arbitration method.

Introduction

GB/T6150.2-2022 Core Technology Innovation Breakthrough

Analysis of Key Points of Standard Innovation

Compared with the 2008 version, the new version uses inductively coupled plasma emission spectrometry to replace the traditional hydride atomic absorption method, which improves the detection accuracy by 20 times and achieves 0.01% level trace tin detection. The time window of method 1 is expanded to 20% high content detection, fully covering the detection needs of industrial production.

---

Comparison of key technologies of detection methods

Technical indicators	Potassium iodate titration method	ICP-AES method
Determination range (mass fraction)	1.00%-20.00%	0.010%-2.00%
Sample processing complexity	3-hour sintering reduction process	Simplified pretreatment steps
Typical precision CV value	±0.07% (10% content)	±0.003μg/mL

---

Application scenario solution guide

Quality control example of ore dressing plant

A tungsten mine in Henan Province uses MAF-900 fully automatic titrator with potassium iodate titration method for daily batch testing, and combines ICP-AES for raw material acceptance arbitration, successfully shortening the quality inspection cycle by 42%.

Precautions statement

• High manganese medium causes lead interference and requires secondary calibration (Pb>500ppm)
• Method 2 requires 5℃ cold chain storage of yttrium hydroxide carrier reserve solution

GB/T 6150.2-2022 Referenced Document

• GB/T 6682 Water for analytical laboratory use.Specification and test methods
• GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 6150.2-2022 history

• 2022 GB/T 6150.2-2022 Methods for chemical analysis of tungsten concentrates—Part 2: Determination of tin content—Potassium iodate titrimetry and inductively coupled plasma atomic emission spectrometry
• 2008 GB/T 6150.2-2008 Methods for chemical analysis of tungsten concentrates.Determination of tin content.The potassium iodate volumetry and hydrogenate atomic absorption spectrometry
• 1985 GB/T 6150.2-1985 Methods for chemical analysis of tungsten concentrates--The potassium iodate volumetric method for the determination of tin content

GB/T 6150.2-2022 -All Parts