Vapor Generation Accessory VGA–77 Operation manual

VGA–77For example, for Te and Se, a 10x or more increase in the signalintensity is observed if the lower oxidation state is prepared.Solutions containing H 2SO 4and HClO 4acids may give little or nosignal for any hydride-forming elements. The use of H 2SO 4and HClO 4is to be avoided.Sample AND standard AND blank solutions MUST be prepared by asimilar method to obtain the lower oxidation state.4.2.3 InterferencesThe measurement of some elements by VGA can be affected by thepresence of other elements or molecules in the sample matrix. Thesereduce the amount of element detected by the spectrometer byadversely affecting the amount of hydride formed.A list of observed interferences is given in the following table.AnalyteSevere to moderatesuppression >50%Au, Ge, Ni, Pt, Pd,Rh, RuModerate to slightsuppression 10–50%Not significant suppression