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某地出產的菱鎂矿,由於地質勘探設計上的需要,抽出12个組合矿样委託給三个化驗室進行分析,以作核对。但是,矿样分析结果差異颇大,其中氧化鎂達3％以上,氧化鈣亦达1.7％。在進行分析中,各化驗室所应用的分析方法各不相同,它們分別採用了古典法、苏联國定标準法(2642——44) 及决速法。为了了解由於分析方法不同所可能引起的分析誤差,我們就上述三种方法進行了研究,希望找出較为準確的測定菱鎂矿中氧化鈣和氧化鎂的方法。
A local production of magnesite, due to geological exploration and design needs, extracted 12 combinations of ore samples entrusted to three laboratories for analysis, for verification. However, the results of mineral analysis vary widely, with more than 3% magnesia and 1.7% calcium oxide. During the analysis, the analytical methods used by different laboratories varied. They used the classical method, the Soviet Union’s national standard method (2642--44) and the speed-determining method. In order to understand the analytical errors that may be caused by different analytical methods, we conducted a study on the above three methods, hoping to find a more accurate method for the determination of calcium oxide and magnesium oxide in magnesite.