TM99-04 Inductively Coupled Plasma - Optical Emission Spectrometry to replace Flame Atomic Absorption Spectrometry and Direct Current Plasma - Atomic Emission Spectrometry for the determination of whole-water recoverable trace metals and major ions in dig

Effective April 1, 1999, the National Water Quality Laboratory (NWQL) has replaced the Flame Atomic Absorption Spectrometry (FAAS) and Direct Current Plasma - Atomic Emission Spectrometry (DCP-AES) methods for the determination of whole-water recoverable (WWR) trace metals and major ions in digested water samples with the Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES) technique. The ICP-OES WWR method is described in Open-File Report 98-165. The WWR digestion is described in Open-File Report 96-225. The WWR FAAS and DCP-AES methods being replaced by the ICP-OES method are listed in Table 1. Four additional WWR tests -- molybdenum, silica, silver, and vanadium -- are also being offered by the ICP technique.