ASTM C1234 - High Pressure Digestion of Oil in HPA-S
HPA-S represents the ultimate performance in wet chemical high pressure digestion sample preparation in demanding cases. Hermetically sealed reaction vessels, temperatures up to 320 °C and pressures up to 130 bar guarantee quick and complete mineralization - free of systematic errors.
There are several methods for determination of trace elements in oil samples, e.g. direct determination by spectroscopic methods after dilution with organic solvents, determination of the elements in stableemulsion systems or the usage of conventional digestion methods such as oxygen combustion. However, all these methods have inherent problems. In order to avoid matrix problems, wet digestion methods are a suitable way for sample preparation for the accurate analysis of trace elements in oil products.
There is already an existing ASTM method (C1234 - 11), using the advantages of HPA-S (high pressure, high temperature, closed vessels, clean vessel materials) for digestion of different kinds of oil samples. It is specified for the determination of up to 28 different elements by ICP-AES, CVAAS, GFAAS or ICP-MS.
For this work HPA-S was used to reach clear solutions by profiting from the advantages of this system.
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