在放射性气溶胶的许多监测方法中,概括起来可分为物理方法和化学方法两大类。 在化学方法中,有些已经相当成熟,有的已成为常规测量方法。例如,通常使用的铀的目测萤光法,基本上能达到灵敏度高和设备简单的要求。这种方法只需要一台简单的功率较高的萤光灯;配备适当的滤光片,就可以测定10~(-8)—10~(-9)克/熔珠的铀。天然铀在工作场所空气中的最大容许浓度为0.02毫克/立方米。可见,萤光分析方法能较容易地 In many monitoring methods of radioactive aerosols, can be summed up in two broad categories of physical methods and chemical methods. Some of the chemical methods have been quite mature, and some have become routine measurement methods. For example, the commonly used uranium visual fluorescence method basically achieves the requirements of high sensitivity and simple equipment. This method requires only a simple high-power fluorescent lamp; with appropriate filters, it is possible to measure uranium in the range of 10 -8 to 10 -9 grams per bead. The maximum permissible concentration of natural uranium in the workplace air is 0.02 mg / m3. Visible, fluorescent analysis methods can be more easily