Modified matrix volatilization setup for characterization of high purity germanium

Area of Science:

• Analytical Chemistry
• Materials Science
• Trace Element Analysis

Background:

• Characterizing high purity germanium (7N) requires sensitive analytical methods.
• Existing methods may face challenges with reproducibility and detection limits.
• Trace element impurities can significantly impact germanium's semiconductor properties.

Purpose of the Study:

• To refine the matrix volatilization (MV) method for analyzing high purity germanium.
• To improve the reproducibility and lower the detection limits of the MV method.
• To expand the applicability of the method for trace element analysis in germanium.

Main Methods:

• Utilized a modified matrix volatilization (MV) method with controlled chlorine and argon gas flow.
• Employed a quartz reaction vessel to minimize process blanks.
• Quantification performed using inductively coupled plasma quadrupole mass spectrometry (ICP-QMS) and continuum source graphite furnace atomic absorption spectrometry (CS-GFAAS).

Main Results:

• Achieved improved reproducibility in analytical results due to controlled gas transport and uniform reaction.
• Reduced process blank levels significantly by using a quartz reaction vessel.
• Established method accuracy via spike recovery tests, with precision ranging from 1-30% and LODs between 18 and 0.033 ng g(-1).

Conclusions:

• The modified MV method offers enhanced performance for high purity germanium analysis.
• The technique demonstrates improved detection limits and reliability for trace element quantification.
• The method's applicability was successfully extended to rare earth and other elements.