Standard Practice for Alternate Actinide Calibration for Inductively Coupled Plasma-Mass Spectrometry

Importancia y uso:

5.1 One of the benefits of this standard practice is the ability to calibrate for the analysis of highly radioactive actinides using calibration standards at much lower specific activities (that is,  ²³²Th and ²³⁸U). Environmental laboratories may find this standard practice useful if facilities are not available to handle the highly radioactive standards of the individual actinides of interest.

5.2 The degree of actual mass bias is variable and is dependent upon instrument tune parameters. This standard practice uses universal interference equations to derive a mass bias correction that is specific to the instrument parameters and tune used for sample data acquisition and not based on a historical average.

5.3 Mass bias correction uses the instrument software interference equations and does not require additional subsequent off-line calculations.

5.4 The methodology that this standard practice is based on has been used for the determination of ²³²Th and  ²³⁷Np in enriched uranium solutions and the determination of  ²⁴¹Am in plutonium and uranium legacy oxides following dissolution and ion extraction chromatography separation.

5.5 Data presented in Section 12 were developed using a quadrupole ICP-MS. This practice can also be applied to high resolution ICP-MS with appropriate validation.

Subcomité:

C26.05

Volúmen:

12.01

Número ICS:

71.040.50 (Physicochemical methods of analysis)

Palabras clave:

actinides; inductively coupled plasma-mass spectrometry (ICP-MS); mass bias; thorium; uranium;