本文描述了同位素源X射线荧光法快速在线测定感光胶片含银量的两种方法及装置。平衡滤光片法，测量时间为200秒，1g/m

2

含银量相当于24cps，测量相对误差为±5%。探头可与一般同位素源X射线荧光分析仪连用。散射校正法，测量时间为10秒，1g/m

2

含银量相当于1×10

3

cps，在1~8g/m

2

含银量范围内测量相对误差为±5%（置信度95%）。根据本方法研制了在线测银仪。两种方法皆可适用于在线测定和实验室常规测定。

Two methods and associate apparatus for rapidly on line measuring the silve content in photographic film emulsion by means of radioisotope source excited X-ray fluorescence are described. Following results are obtained with the first method: 1g/m

2

silver content equals to 24 cps

analysis period is 200 seconds and relative error ±5%. The detector can be used with a universal radioisotope source X-ray fluorescence analyzer.

In another method

the equivalent of 1g/m

2

silver content is 1000cps

analysis period 10 seconds and relative error ±5% (95% confidence level) in the range of 1 ~8g/m

2

silver content. According to this method

a silver gauge has well been designed and manufactured.

Both these two methods are suitable for the application of determinating the silver content in coating process on line or in a routine test.