Alternatively, for direct energy coupling devices, such as a microwave, digest
samples for analysis by FLAA and ICP-AES by adding 5 mL HCl and 10 mL H O to the 2
sample digest from 7.2.3 and heat the sample to 95oC ± 5EC, Reflux at 95oC ± 5EC without
boiling for 5 minutes.