QXRD is achieved by the use of a calibration standard matched to the samples being analysed and the basic principle of the external standard method. He explained that accreditation provides for a sensible approach to proving the worth of results. It ensures that all equipment really performs to an acceptable standard throughout its lifetime. David, gave the closing statement for the meeting where he commented that QXRD has may problems to overcome but these meetings have gone a way towards answering many of them. He suggested another forum to answer many points raised at this meeting.
Results are worthless unless they quote the level of error or confidence.
In conclusion, QXRD is foreseeable as an industrial tool, however, more research is needed before the general User can reap its benefits. Only through the efforts of manufactures can this be achieved. I would also like to thank Philips Research Laboratories for their warm hospitality.