GB/T 20899.10-2025 in English
VALIDMethods for chemical analysis of gold ores—Part 10: Determination of antimony content
- Issued on:2025-06-30
- Implemented on:2026-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$262.00
| Standard No: | GB/T 20899.10-2025 |
| Document status: | VALID |
| Title in English: | Methods for chemical analysis of gold ores—Part 10: Determination of antimony content |
| Title in Chinese: | 金矿石化学分析方法 第10部分：锑量的测定 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2025-06-30 |
| Implemented on: | 2026-01-01 |
| Superseding: |
GB/T 20899.10-2007 Methods for chemical analysis of gold ores—Part 10:Determination of antimony contents
|
| ICS Classification: | 73.060.99-Other metalliferous minerals |
| Chinese Classification: | D46-Precious metal ore |
| Professional Classification: | GB-National Standard |
| Related Keywords: | antimony content introduction background
parameters antimony content rangesample weight high content samples spectrometry0.220.040.05 low content samples high carbon content |
| Related Topics: | Ore Chemical Analysis
gold ore volume method sb antimony gold analysis mine Antimony content Analysis method of indium in ore Nickel ore chemical analysis method antimony |
《GB/T 20899.10-2025金矿石化学分析方法 第10部分：锑量的测定》由TC379（全国黄金标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Background of Standard Revision and Technological Evolution
This document replaces GB/T 20899.10-2007 version. The main technical changes include:
| Changes | 2007 version | 2025 version |
|---|---|---|
| Determination method | Hydride generation-atomic fluorescence spectrometry | Flame atomic absorption spectrometry |
| Interference elimination | Unspecified | New interference element elimination method |
| Precision index | Tolerance | Repeatability and reproducibility |
Method 1: Flame Atomic Absorption Spectrometry
Technical Principle
After the sample is decomposed by nitric acid-sulfuric acid, the absorbance of antimony is measured at a wavelength of 217.6nm by an atomic absorption spectrometer. The characteristic concentration is ≤0.30μg/mL.
Key Operating Parameters
| Antimony Content Range | Sample Weight (g) | Aliquot Volume (mL) |
|---|---|---|
| 0.050%-0.50% | 0.30 | Full Amount |
| >0.50%-1.00% | 0.20 | Full Amount |
| >1.00%-5.00% | 0.20 | 20.00 |
Method 2: Cerium Sulfate Titration
Reaction Mechanism
In a hydrochloric acid medium, using methyl orange as an indicator, cerium sulfate oxidizes Sb(III) to Sb(V). The red color of the solution disappears at the endpoint. The standard solution calibration requirement is a range of ≤ 2×10-4 mol/L.
Key points of operation
- Decomposition temperature: 350℃slightly boiling for 30 minutes
- Titration conditions: 80-90℃hot solution
- Filter paper dosage: about 8cm2as reducing agent
Precision comparison analysis
| Method | Content (%) | Repeatability limit (r) | Reproducibility limit (R) |
|---|---|---|---|
| Spectrometry | 0.22 | 0.04 | 0.05 |
