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Egg"gImi <br /> F <br /> F <br /> 3. Verification of results with an alternative method. For example, calcium may be <br /> determined by atomic absorption, ion chromatography or titrimetric methods. <br /> Volatils organic compounds may be determined through either purge-and-trap or <br /> liquid-liquid extraction methods. <br /> Miscellaneous Checks of Accuracy <br /> Where trace analysis is involved, purity of the solvents, reagents and gases employed is <br /> of great concern. The laboratory maintains a service contract on all major <br /> instrumentation, including gas chromatograph, atomic absorptior. on chromatography <br /> and total organic carbon analyzers,to provide they are serviced an,:maintained regularly. <br /> The above program is more than sufficient for most needs.Additional quality assurance, <br /> such as spikes and duplicates on all analyses, will be provided if requested. <br /> s <br /> { <br /> y <br /> t� <br />