We are currently doing a method validation of MP-AES. Upon going through the parameters, we believe there are some errors. For example, during our accuracy testing, we're using CRMs and our measurements are too far from the true value. We're also doing standard additions but the measurements are still high. Our solutions were 50 ml (0.5 g of samples).

Also, how can we use the method of standard addition if the measurements are still high? It should correct the interferences I think.