ＩＭＡ－３型激光微量物质分析仪是用小型封闭式紫外脉冲激光器做激发光源，根据激光－时间分辨荧光分析原理设计的一种通用型微量物质分析仪器。仪器由激光器系统和测量系统两部分组成，适用于发光寿命在１μｓ～１０ｍｓ的物质测量。该仪器灵敏度高、选择性好、操作简单、有较好的稳定性和可靠性，检出下限可达１０￣（－１３）ｇ／ｍｌ（Ｅｕ）．在１×１０￣（－１０）～２×１０￣（－８）ｇ／ｍｌ量级测量时ＲＳＤ在５％～１０％范围。 IMA-3 laser trace material analyzer is a small closed-end ultraviolet pulsed laser excitation light source, according to laser-time-resolved fluorescence analysis principle designed a universal trace material analysis instrument. Instrument by the laser system and measurement system composed of two parts for light-emitting life in the 1μs ~ 10ms of material measurement. The instrument has high sensitivity, good selectivity, simple operation, good stability and reliability. The detection limit is up to 10 ~ (-13) g / ml (Eu). The RSD ranged from 5% to 10% when measured on the order of 1 × 10 -10 -10 2 × 10 -8 g / ml.