Personnel using this document should have practical experience in formal laboratory work and should be aware that this document does not cover all potential safety issues. Users are responsible for taking appropriate safety and health measures to ensure compliance with relevant national regulations. The document stipulates the use of Inductance Coupled Plasma Atomic Emission Spectroscopy (AES) method for the measurement of cobalt, nickel and aluminum content in ferrotungsten, which is applicable to the determination range of 0.010% to 5.00% of the cobalt, nickel and aluminum content in ferrotungsten. The document cites a series of normative reference documents, including the taking and preparation of samples for chemical analysis of ferroalloys, the specifications and test methods of analytical laboratory water, the representation and determination of numerical revision rules and limit values, etc. Determination principles include the analysis of the sample and the formation of tungstic acid settling. Light spectrum intensity of cobalt, nickel and aluminum is determined by Inductance Coupled Plasma Atomic Emission Spectrometer, and their content is checked on the calibrated Linear dispersion. In terms of reagents and materials, unless otherwise specified, only reagents confirmed to be analytically pure and in accordance with the regulations are used.