Z-2000 series of flame, furnace and tandem atomic absorption spectrophotometers can accurately determine low concentrations of toxic elements such as cadmium, mercury, lead and hexavalent chromium. This is of increasing importance with the implementation of the Waste 
Electrical and Electronic Equipment Directive and the planned implementation of the Restriction of Hazardous Substances.
 
A new method of sample preparation for polyethylene samples uses high pressure microwave digestion with nitric acid. This replaces traditional extraction methods using sulphuric acid which is not suitable for the measurement of  lead. Details of the new  extraction method can be found in a new technical data sheet. (AA Sheet No. 72) For a copy,  e- mail: info@hitachi-hitec-uk.com.
 
Has polarized Zeeman background correction method on both flame and furnace instruments, for effective background elimination and stable baselines. The dual-beam optics feature twin detectors. Detection limits for the flame instrument (in micrograms/g) are Cd: 2, Pb: 50 and Cr: 
50. For the furnace instrument they are: Cd: 0.01, Pb: 0.25 and Cr:  0.2.
 
Hitachi High-Technologies Corp, hitachi-hitec-uk.com

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