Ammonium metatungstate testing equipment based on the detection method will be various. Conventional analysis techniques of high purity ammonium metatungstate are graphite furnace atomic absorption spectrometry (GFAAS), flame atomic absorption spectrometry (FAAS) and inductively coupled plasma emission spectrometry (ICP-MS), in addition, ion exchange, liquid-liquid extraction and co-precipitation method which separates analysis and matrix.
Both Graphite Furnace Atomic Absorption Spectrometry and Atomic Absorption Spectrometry method use the atomizer. Atomizer is an apparatus of atomizing the sample of atomic absorption spectrometry, and it will convert the sample to the free atomic vapor (ground state atoms) thus to absorb the radiation and calculate the analyte content. Atomizer has many types and can be divided into two categories of thermal and electric filling atomizer. The former includes a pre-mixed, all-consuming; the latter includes graphite furnace, carbon filament atomizer, atomizer carbon rod, graphite increased exhaust, graphite probes ect..
Ammonium metatungstate testing equipments of inductively coupled plasma atomic emission spectrometry are plasma torch (composed of three concentric quartz tubes), high-frequency generator (to generate a high-frequency electric current), induction loop, gas supply and atomization system.