检出限(Detection limit或Limit of detection)是评价光谱仪器和分析方法检测微量组分能力的一项重要指标,长期以来在使用中有些混乱,1975年国际纯粹与应用化学联合会(IUPAC)推荐了检出限的定义,1980年环境分析化学ACS分会重申按所要求置信度应选k=3。因此,近年来检出限这一概念及其计算方法才逐渐统一起来。 Detection limit or Limit of detection is an important indicator to evaluate the ability of spectrometric instruments and analytical methods to detect trace components. For a long time, it has been somewhat confused. As recommended by the International Union of Pure and Applied Chemistry (IUPAC) in 1975 The limit of detection was defined in 1980 by the Analytical Chemistry ACS Branch, which reiterated that k = 3 should be chosen according to the required confidence level. Therefore, the concept of detection limit and its calculation method have been gradually unifying in recent years.