The Ricca Chemical matrix modifier with a composition of 94.59% water, 4.91% nitric acid, 0.49% palladium and 0.01% hydrochloric acid, is suitable for use as a buffer for analyte stabilization or sample matrix volatilization. It can be stored at a temperature of 15 to 30 degree C.

The Ricca Chemical matrix modifier with a composition of 94.98% water, 4.82% nitric acid, 0.19% palladium and 0.01% hydrochloric acid, is suitable for use as a buffer for analyte stabilization or sample matrix volatilization. It can be stored at a temperature of 15 to 30 degree C.