Cite as: Prange, A.; Schwenke, H.: Sample treatment for TXRF: requirements and prospects. In: Barrett, C.; Gilfrich, J.; Jenkins, R.; Huang, T.; Predecki, P. (Ed.): Advances in X-Ray Analysis: Proceedings of the Thirty-seventh Annual Conference on Applications of X-Ray Analysis. Steamboat Springs, CO (USA). 1989. 211-220.