Aerosols, long irradiation neutron activation analysis
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Detection level, a '1' indicates that while a peak was detected, the isotope sample was below the level of detection relative to background 'noise'. The element concentration...
检测限（Detection level）：标记为‘1’时，表示虽已检测到峰，但相较于背景‘噪声’，同位素样品的浓度低于检测限。元素浓度……
