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简易原子吸收分光光度计与模拟微分放大器联用,可以极大地提高火焰原子吸收法的灵敏度。导出了微分值与被测元素浓度成正比,并被实验证实。测镁的线性范围为1—140ng/ml,变动系数约5%(5ng/ml)。
The combination of simple atomic absorption spectrophotometer and analog differential amplifier can greatly improve the flame atomic absorption spectrometry sensitivity. Derived differential value is proportional to the concentration of the measured element, and was experimentally confirmed. The linear range of magnesium was 1-140 ng / ml with a coefficient of variation of about 5% (5 ng / ml).