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利用双联传感器得到光声信号的叠加作用,可提高光声检测灵敏度或扣除溶液背景吸收。以亚硝基R盐测定钴为例,得到最低检测浓度为0.3ng/mL,相当于4.25×10~(-5)的吸收。
The use of double sensors to obtain the superimposition of photoacoustic signals can increase the photoacoustic detection sensitivity or subtract the background absorption of the solution. Taking the cobalt of nitroso R salt as an example, the lowest detection concentration is 0.3 ng / mL, corresponding to 4.25 × 10 -5 absorption.