GB/T 7999-2015Optical emission spectrometric analysis method of aluminum and aluminum alloys (English PDF)

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

This Standard replaced GB/T 7999-2007 Optical Emission Spectrometric Analysis Method of Aluminum and Aluminum Alloys; compared with GB/T 7999-2007, this Standard has the major changes as follows.

--- Add "Warning";

--- Increase 4 elements of barium, boron, lithium, scandium to "1 Scope";

--- Re-adjust the order of elements according to their English names in Table 1 and Table 2;

--- Expand the analytical lower limit of 11 elements like bismuth, cadmium, calcium, chromium, gallium, lead, nickel, sodium, vanadium, zinc and zirconium;

--- Add provisions of "standard sample, control sample" to "4 Auxiliary Equipment, Materials, Environment";

--- Add provisions of "apparatus safety guarantee" in "5 Apparatus";

--- Change the contents of "6 Specimen" into "specimen shall meet the requirements of GB/T 17432";

--- Re-draw "7 Analytical Procedures";

--- Change "Measurement range" in "Table 2" into "possible interference elements and their wavelengths"; add a recommended analytical spectral line for each 7 elements including calcium, cerium, lead, magnesium, manganese, nickel, vanadium, etc.; the spectral line of Ga element is revised to be "294.36" nm;

--- Add the provisions of allowable deviation with mass fraction <=0.0005% and repeatability;

--- Combine "9 Quality Assurance and Control" into "7 Analytical Procedures";

--- Add "9 Test Report".

1 Scope

This Standard specifies the optical emission spectrometric analysis method of aluminum, aluminum alloys and impurities.

This Standard is applicable to measure 28 elements at the same time in the aluminum and aluminum alloy like antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, calcium, cerium, chromium, copper, gallium, iron, lead, lithium, magnesium, manganese, nickel, phosphorus, scandium, silicon, sodium, strontium, tin, titanium, vanadium, zinc, and zirconium; the measuring scope can see Table 1.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgment of Limiting Values

GB/T 17432 Methods of Sampling for Analyzing the Chemical Composition of Wrought Aluminum and Aluminum Alloys

3 Method Summary

In the argon atmosphere, place the specimen processed as per requirements onto the excitation station, and act as an electrode; the energy generated by light source generator vaporize, atomize the analyte, as well as excite and emit the characteristic spectral line of the to-be-measured elements;

4 Auxiliary Equipment, Material and Environment

5 Apparatus

5.1 Optical emission spectrometer.

5.2 Optical emission spectrometer shall be equipped with power restrictions using safety interlocks.

6 Specimen

The specimen shall meet the requirements of GB/T 17432.

7 Analytical Procedures

7.1 Working state control of optical emission spectrometer

8 Precision

9 Test Report

The contents of test report specified in this Chapter shall include the following items at least. […]