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| DETERMINATION OF BORON IN STEEL AND IRON BY THE ALUMINUM SPARK METHOD |
| WANG HONG-JANG Institute of Metal Research; Anademia Sinica |
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Cite this article:
WANG HONG-JANG Institute of Metal Research; Anademia Sinica. DETERMINATION OF BORON IN STEEL AND IRON BY THE ALUMINUM SPARK METHOD. Acta Metall Sin, 1959, 4(1): 75-80.
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Abstract Determination of boron in steel and iron by the aluminum spark method possesses highersensitivity and precision. It is not necessary to separate iron from the sample. The sample isdissolved with perchloric acid, and into the perchlorate solution is added a certain amount ofNaOH solution. The standards are prepared from synthetic solutions with different proportionsof boric acid added. Electrodes are made from pure aluminum 8 mm in diameter and 5-10 cm in length. Theends of the electrodes should be machined flat and the sharp edges should be removed by light cham-fering to reduce the tendency of sparks to strike these sharp edges. Drops of solutions are placed onthe surface of the electrode by means of a micropipet calibrated to deliver 0.05 ml. With a con-trol spark source and medium spectrograph we can analyze boron in the range from 0.005％ to1.0％ by the line B 2496.778A.
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Received: 18 January 1959
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