SN/T 5250-2020 in English

VALID

Determination of sulfur content in mineral products - High frequency combustion with infrared absorption method

Issued on:2020-08-27
Implemented on:2021-03-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $190.00
$185.00

Standard No:	SN/T 5250-2020
Document status:	VALID
Title in English:	Determination of sulfur content in mineral products - High frequency combustion with infrared absorption method
Title in Chinese:	矿产品中硫含量的测定高频燃烧红外吸收法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-08-27
Implemented on:	2021-03-01
Professional Classification:	SN-Import&Export Inspection
Related Keywords:	sulfur content infrared absorption method introduction analysis high sulfur range high frequency combustion 13.04-52.17mg benchmark potassium sulfate sulfur content rangesample weightdilution requirementsflux
Related Topics:	infrared High frequency infrared Infrared absorption Sulfur content Minerals sulfur content sulfur infrared High Frequency Infrared Carbon and Sulfur Analyzer IR peak content Infrared centering Infrared Absorption of Carboxyl Carbonyl Infrared absorption peak of carboxycarbonyl Carboxylic Infrared Absorption Carboxycarbonyl infrared absorption peak Infrared is sn content Infrared+is Infrared quantification Infrared absorption method Infrared absorption Sulfur content Infrared+ Infrared is infrared absorption edge Infrared peak + content The infrared absorption peak of pyrene Infrared pyrene absorption peak High Frequency Infrared Carbon and Sulfur Determination Infrared absorption peaks of ketones Infrared Absorption Absorption Peak Infrared a Absorption Cell Infrared Mid-infrared quantification Infrared detection cell The infrared absorption peak of cobalt Cobalt infrared absorption peak Absorption Test Products Infrared carbon sulfur meter does not burn Cobalt 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absorption peak On-machine measurement Sulfur infrared absorption peak The infrared absorption peak of bromine Bromine infrared absorption peak Infrared absorption of guanidine as infrared How to test the absorption of infrared rays Determination of total sulfur in coal by infrared method Infrared absorption detection method Determination of Metal Chromium Sulfur Content Infrared Absorption Method and Combustion Neutralization Titration Method Mid-infrared Absorbing Materials Method for Determination of Sulfur Content in Minerals Infrared reverse absorption peak Infrared absorption transfer Sulfur Content in Lithium Gold Ore leco sulfur Sulfur content standard Infrared absorption peak of hydrazone Infrared quantitative semi-quantitative Determination of Metal Chromium Sulfur Content Infrared Absorption Method and Combustion Neutralization Titration Method Determination of tungsten iron sulfur content infrared absorption method and combustion Naphthalene infrared absorption peak Determination of Carbon and Sulfur by High Frequency Infrared Infrared a Infrared Absorption Peak Method Infrared absorption of phosphine as infrared Copper absorbs infrared Mid-infrared marker Infrared Absorption Peak Detection Basis for infrared quantification Infrared relative content low infrared absorption Infrared absorber High Frequency Infrared Sulfur in Coke Determination of mid-infrared Infrared absorption peak ketone Ammonium infrared absorption peak IR peak content How does the high frequency carbon sulfur meter burn Infrared Absorption of Naphthalene Infrared absorption sample preparation method Infrared absorption peaks of metals High Frequency Combustion Infrared Absorption Method Ore Sulfur Content Infrared Infrared absorption peak of sulfone group High frequency combustion infrared Determination of total carbon and sulfur content in steel Infrared absorption method after combustion in high frequency induction furnace How to measure infrared on black samples The relationship between infrared energy and frequency Hydroxyl infrared absorption peak Infrared absorption peak of ester bond co2 infrared absorption peak Items with high nickel sulfate content in daily life Infrared absorption cell Standard infrared absorbing sheet High frequency combustion infrared absorption Calculation method of sulfur content in received base Method for pressing infrared samples

Introduction

Analysis of Standard Technology Evolution

This standard replaces SN/T 2032 (2007 version). The main improvements include: Extension of the measurement range to 0.005%-55%, a new high-frequency infrared carbon and sulfur analyzer parameter system, and multi-laboratory verification of precision data based on GB/T 6379.2. Technological evolution is reflected in:

Version	Measurement range	Applicable mineral types	Precision verification
2007 version	0.01%-30%	5 categories	Single laboratory
2020 version	0.005%-55%	8 categories	8 laboratories combined

Core method principle

Sample in The SO₂ generated by tungsten pellets + pure iron in a high-frequency induction furnace (18MHz) is carried into an infrared detection cell by oxygen and measured by characteristic absorption at a voltage of 7.5-8.1V. Key reaction formula:
FeS + O₂ → FeO + SO₂↑

Key operating specifications

Standard curve establishment case

Take copper concentrate detection as an example:
1. Low sulfur range (0.02%-1.6%): Use potassium sulfate solution for gradient dilution, 50μL standard solution corresponds to 0.02-0.8mg sulfur
2. High sulfur range (2.4%-38.4%): Directly weigh 13.04-52.17mg benchmark potassium sulfate

Sulfur content range	Sample weight	Dilution requirements	Flux ratio
0.005-10%	0.10g	Not required	0.5gFe+1.6gW
40-55%	0.5g+3gSiO₂	Grind for 5min	0.2gSn+1.6gW

Implementation suggestions

1. Instrument calibration: More than 2 standard substances should be used for verification every day. LECO CS230C parameters are recommended (Appendix A)
2. Interference control: Samples containing crystal water need to be pre-baked, and quartz wool needs to be replaced regularly
3. Data quality: Repeatability limit is 0.017m+0.000 (m is the mean)

More samples: JC/T 2453-2018 JJG 21-2008 QC/T 942-2021

Sample only — not a preview of SN/T 5250-2020

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