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1958年物探局对金属量测量样品半定量光谱分析的质量检查,规定了新的误差计算方法,即相对误差按(A-B)/(A+B)×100公式计算(式中 A 为第一次分析结果,B 为第二次分析结果),在一批检查样品中误差在0—50%内的样品数占80%以上时质量及格,小于80%质量不及格。这个误差计算方法,既根据了金属量测量的要求,又结合了半定量光谱分析准确度的可能性,与过去采用的均方误差计算方法比较起来,大大节省了工作中误差计算的时间。但由于这项规定的体计算方法说明得不够详细,各人的理解不一样,往往同一种分析质量,同一种检查结果,会算出几种误差百分率来。因此,究竟应该如何计算才能正确说明质量情况,有必要说明,同时,当谱线黑度对比用的标准样品含量采用10∶3∶1系列时,规定50%的相对误
In 1958, the Bureau of Geophysical Bureau conducted a quality inspection on the semi-quantitative spectrometric analysis of the metal content measurement sample, setting out a new method for calculating the error, that is, the relative error is calculated according to the formula of (AB) / (A + B) × 100 Analysis results, B is the second analysis results), in a group of inspection samples within the error of 0-50% of the samples in more than 80% of the pass quality, less than 80% of the quality failed. This method of error calculation not only based on the requirements of metal measurement, but also combines the possibility of semi-quantitative spectral analysis accuracy, compared with the traditional mean square error method used in the past, saving the time of error calculation. However, since the provisions of the body calculation method is not detailed enough, everyone’s understanding is different, often with the same kind of analysis, the same test results, will calculate the percentage of error. Therefore, what exactly should be calculated to correctly explain the quality of the situation, it is necessary to explain, at the same time, when the spectral contrast with the standard sample content of blackness using 10: 3: 1 series, the provisions of the relative error of 50%