Certified Reference Material: Pyrometallurgical Reference Material for Sulphur
Printable version of the certificate (PDF, 135.10 kb)
First issued: July 1990
Version: November 2008
The raw material for HCC-1 was donated by Hudson Bay Mining and Smelting Limited, Flin Flon, Manitoba.
HCC-1 is a typical copper concentrate mill feed. It is therefore expected to contain more than 80% chalcopyrite, 5-10% each of pyrite and sphalerite, and a trace of pyrrhotite.
HCC-1 is suitable for analysis of sulphur in pyrometallurgical feed materials using a barium sulphate precipitation method. Examples of intended use are: for quality control in the analysis of samples of a similar type, method development, arbitration and the calibration of equipment.
Instructions for use
The assigned values pertain to the date when issued. CCRMP is not responsible for changes occurring after receipt by the user. HCC-1 should be used “as is". The contents of the bottle should be thoroughly mixed before taking samples. After opening the sealed pouch, the bottle should be kept in a dessicator or resealed under nitrogen to prevent oxidation. The contents of the bottle should be exposed to the atmosphere for the shortest possible time.
Method of preparation
The raw material was passed through a Denver roller and screened. Forty-five kg of less than 106 pm particulate was recovered. After blending for 3 hours, the material was bottled in 50-g units. This is the only size available. Each bottle was sealed under nitrogen in a mylar-aluminum foil pouch to provide long-term protection against oxidation.
A formal assessment of homogeneity was not performed on HCC-1. It was assumed that the successful previous experience in the preparation of homogeneous lots of several hundred kilograms of similar materials, CCU-1, CCU-1 a, and CCU-1 b, without problem, was sufficient to expect homogeneity in a lot of 45 kg. This assumption is supported by the fact that the within-laboratory standard deviation obtained in the interlaboratory measurement program for HCC-1 is smaller than that obtained with similar materials.
The participants in the interlaboratory measurement program for HCC-1 used sample sizes ranging from 0.15 to 1-g. Use of a smaller sub-sample will invalidate the use of the certified value and associated parameters. Further details are available in the certification report.
Ten laboratories from the smelting industry and government participated in the 1989 interlaboratory certification program. Sulphur was analysed using a barium sulphate precipitation method. A one-way analysis of variance was used to estimate the consensus value and associated statistical parameters. Full details of all of the work, including statistical analysis, the methods and the names of the participants are contained in CCRMP Report 90-4E.
|Within-laboratory standard deviation||0.095|
|Between-laboratories standard deviation||0.14|
|95% confidence limits||± 0.12|
HCC-1 was released in 1990. The 2008 version of the certificate has no technical additions or revisions.
Period of validity
These certified values are valid until December 31, 2030. The stability of the material will be monitored every two years. Purchasers will be notified of any significant changes.
The Canadian Certified Reference Materials Project has prepared this reference material and statistically evaluated the analytical data of the interlaboratory certification program to the best of its ability. The purchaser, by receipt hereof, releases and indemnifies the Canadian Certified Reference Materials Project from and against all liability and costs arising out of the use of this material and information.
The preparation and certification procedures used for HCC-1, including methods and values obtained by individual laboratories, are given in CCRMP Report 90-4E. This report is available free of charge on request.
For further information
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