Simple Liquid Sample Holder for X-Ray Fluorescence Analysis

The conventional multi-purpose sample holder type P.W. 1527, supplied with the Philips X-Ray Spectrograph attachment type P.W. 1520/10, is not entirely leak-proof when used with aqueous solutions and cannot be used with strong acid solutions. Although the manufacturers themselves supply sample holders which are suitable for such solutions and while other liquid sample holders have been described in the literature (1,2,3,4), we have found that a simple modification to the holder mentioned above has led to an extremely reliable holder for even the strongest acid solutions.