论文部分内容阅读
原子吸收分光光度计对各种金属元素的测定具有精密度高、准确性好、选择性强、速度快的特点,因此得到广泛应用。原子吸收分光光度计一般只配有火焰和石墨炉原子化器,在测定汞时,其结果不能达到现代定量分析的要求。我们利用测砷用的氢化物发生器装置,经过改装的反应瓶作汞蒸气发生器,在原子吸收分光光度计上冷原子吸收法测定汞,取得了满意的效果。原理与设备1．原理:汞蒸气对波长253.7nm的共振线具有强烈的吸收作用。汞离子在强酸性的条件下,以氯化亚锡还原成元素汞,以干燥清洁的空气作为载体,将汞吹出,进行冷原子吸收测定,与标准系列比较定量。
Atomic absorption spectrophotometer for the determination of various metal elements with high precision, accuracy, selectivity, speed characteristics, it has been widely used. Atomic absorption spectrophotometers are generally equipped with a flame and graphite furnace atomizer, the results of which can not meet the requirements of modern quantitative analysis. We use arsenic hydride generator device, the modified reaction flask for mercury vapor generator, atomic absorption spectrophotometer for the determination of mercury by cold atomic absorption, and achieved satisfactory results. Principle and equipment 1. Principle: mercury vapor has a strong absorption effect on the resonance line of wavelength 253.7nm. Mercury ions were reduced to elemental mercury with stannous chloride under strongly acidic conditions with dry, clean air as the carrier, and mercury was blown out for cold atomic absorption determination compared to the standard series.