ISO ASTM 51540-2012,Standard Practice for Use of a Radiochromic Liquid Dosimetry System.
ISO ASTM 51540-2012 covers the procedures for preparation, handling, testing, and using radiochromic liquid dosimetry systems of radiochromic dye solutions held in sealed or capped containers.
ASTM 51540-2012 covers the use of spectrophotometric or photometric readout equipment for measuring absorbed dose in materials irradiated by photons and electrons.
In the use of a specific dosimetry system, a calibrationcurve or response function relates the dosimeters response to an absorbed dose traceable to a nationally or internationally recognized standard (11, 12)
The absorbed dose that is measured is usually specifiedi n water. Absorbed dose in other materials may be evaluated by applying the conversion factors discussed in ISO/ASTM Guide51261.
These dosimetry systems may be used in the industrial radiation processing of a variety of products, for example sterilization of medical devices and radiation processing of foods(5,7,13).
The available dynamic range indicated in 1.2.1 is achieved by using a variety of radiochromic leuco dyes (Table 1) in a variety of solutions (Table 2).

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