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A total of 1487 standard samples is available for the spectrochemical analysis of aluminum and its alloys. Only one primary standard is available, and is issued by the National Bureau of Standards. The remainder are secondary standards and consist of 182 disk samples from the Aluminum Company of America; 288 disk and rod samples from the Apex Smelting Co.; 476 disk and rod samples from the Aluminium Laboratories Limited; 50 disk samples from Morris P. Kirk and Son, Inc.; 22 rod samples from Johnson, Matthey, and Co., Ltd.; 27 rod samples from Weiland-Werke Ag; 433 rod, cylinder, and disk samples from Pechiney Co.; 6 chip samples from the Bureau of Analysed Samples, Ltd.; and 2 chip samples from the National Bureau of Standards.