Fig. 2From: Revisited digestion methods for trace element analysis in human hairBar charts showing the recovery rates of trace elements obtained from five different digestion methods; Effects of temperature (a), H2O2 (b), and number of digestion (c) and (d).The recovery rate was calculated by dividing measured value by certified value. Both IAEA085 and IAEA086 samples were prepared in duplicate using the method 3Back to article page