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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Memory Effect of Silver and Aqua Regia by their Permeation into Microwave Digestion Vessels

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2003, v.16 no.3, pp.212-217



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Abstract

The memory effect of silver and aqua regia in the vessel by their permeation was studied during the microwave digestion of samples under the operating conditions of high temperature and pressure. The extent of permeation in vessels with the solution containing silver 5 mg has been shown to be <TEX>$0.97{\mu}g/mL$</TEX> for the digestion of <TEX>$HNO_3$</TEX> solution and <TEX>$0.47{\mu}g/mL$</TEX> for the digestion of oil sample under condition of MDS 180T program (<TEX>$180^{\circ}C$</TEX>, 220 psi).

keywords
memory effect, microwave digestion, permeation, aqua regia, silver


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