Polaroid film in radiation dosimetry and survey.
Abstract The authors initiated a study of the use of Polaroid films in radiation dosimetry and surveys; in particular, the response of various types of Polaroid films to radiation output from different sources. A good correlation was found between the readings from a Victoreen R-chamber and from Polaroid film, regardless of whether a 300 kVp machine or a 137Cs source was used.
[Objective]To establish a method for determination of phosphorus in foods by microwave ashing and molecular absorption spectrometry.[Methods]The samples were incinerated by microwave ashing method,and the determination results were compared with that of GB method.[Results]According to precision test,RSD was 1.5%.Recovery rate was 90.0%～95.8%.There was no significant different in the determination results between microwave ashing method and GB method.[Conclusion]The microwave ashing method for determination of phosphorus in foods has high accuracy and good reproducibility,which is worth popularizing.