Borate fusion is a technique used to prepare various types of samples for subsequent XRF analysis, ICP analysis or AA analysis.

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How borate fusion works

The borate fusion technique consists of mixing a ground sample with a borate flux (lithium or sodium) inside a 95% Pt - 5% Au crucible, heating to 1000 °C with agitation until the flux melts, and then dissolving the sample homogeneously in the flux. When the sample needs to be prepared for X-ray fluorescence (XRF analysis), the hot melt is then cast into a mold and cooled, resulting in a glass disk. The melt can otherwise be poured into diluted acid for subsequent inductively coupled plasma (ICP analysis) or atomic absorption (AA analysis). 

Significant benefits that make the difference

Since XRF is a comparative technique, the standards used to prepare the calibration curve have to closely match the characteristics of the unknown sample to provide an accurate and precise analysis. Fusion is the only sample preparation technique that allows you to matrix-match the standards and unknown that cover a wide range of materials. The glass disks prepared by borate fusion lead to XRF analytical results that are far more precise and accurate than the ones obtained with pressed pellets. In addition of being simple, fast and effective, this preparation technique reduces the number of certified reference materials and calibration applications.  Fusion is also well-suited to prepare samples for ICP analysis and AA analysis since unlike common acid digestion techniques, it allows the complete digestion/dissolution of highly refractory materials, ferroalloys and sulfides. It is also safer for the operator (no use of dangerous acids such as HF and HClO4), faster and automated.

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Claisse LeNeo

Claisse LeNeo

Keeping ahead through Claisse expertise in fusion

More details
Measurement Elemental analysis
Number of samples per fusion cycle 1
Productivity Glass disks (XRF) : up to 4 per hour; Borate and peroxide solutions (ICP-AA): up to 6 per hour
Heating mode Electric
Technology Borate fusion

Claisse TheOx Advanced

Claisse TheOx Advanced

Electric fusion instrument for XRF, AA & ICP analysis

More details
Measurement Elemental analysis
Number of samples per fusion cycle 6
Productivity Glass disks (XRF): up to 24 per hour; Borate and peroxide solutions (ICP-AA): up to 36 per hour
Heating mode Electric
Technology Borate fusion

Claisse Eagon 2

Claisse Eagon 2

Fully automatic fusion machine for XRF analysis

More details
Measurement Elemental analysis
Number of samples per fusion cycle 2
Productivity Glass disks (XRF) : up to 8 per hour
Heating mode Electric
Technology Borate fusion

Claisse M4

Claisse M4

The standard in sample preparation by fusion

More details
Measurement Elemental analysis
Number of samples per fusion cycle 3
Productivity Glass disks (XRF): up to 12 per hour; Borate solutions (ICP-AA): up to 24 per hour
Heating mode Gas
Technology Borate fusion

Claisse LeDoser-12

Claisse LeDoser-12

Just-in-time weighing for optimal precision and repeatability!

More details
Measurement 3D structure / imaging
Productivity Runs autonomously for up to 250 weighings (depending on quantity of flux)
Technology Borate fusion

Claisse LeDoser

Claisse LeDoser

Weigh and dispense borate flux with high precision

More details
Measurement 3D structure / imaging
Precision Up to 0.0001g
Productivity Runs autonomously for up to 250 weighings (depending on quantity of flux)
Technology Borate fusion

Claisse LeNeo

Claisse LeNeo

Keeping ahead through Claisse expertise in fusion

Claisse TheOx Advanced

Claisse TheOx Advanced

Electric fusion instrument for XRF, AA & ICP analysis

Claisse Eagon 2

Claisse Eagon 2

Fully automatic fusion machine for XRF analysis

Claisse M4

Claisse M4

The standard in sample preparation by fusion

Claisse LeDoser-12

Claisse LeDoser-12

Just-in-time weighing for optimal precision and repeatability!

Claisse LeDoser

Claisse LeDoser

Weigh and dispense borate flux with high precision

More details More details More details More details More details More details
Measurement Elemental analysis Elemental analysis Elemental analysis Elemental analysis 3D structure / imaging 3D structure / imaging
Number of samples per fusion cycle 1 6 2 3    
Productivity Glass disks (XRF) : up to 4 per hour; Borate and peroxide solutions (ICP-AA): up to 6 per hour Glass disks (XRF): up to 24 per hour; Borate and peroxide solutions (ICP-AA): up to 36 per hour Glass disks (XRF) : up to 8 per hour Glass disks (XRF): up to 12 per hour; Borate solutions (ICP-AA): up to 24 per hour Runs autonomously for up to 250 weighings (depending on quantity of flux) Runs autonomously for up to 250 weighings (depending on quantity of flux)
Heating mode Electric Electric Electric Gas    
Precision           Up to 0.0001g
Technology Borate fusion Borate fusion Borate fusion Borate fusion Borate fusion Borate fusion

Claisse LeNeo

Claisse TheOx Advanced

Claisse Eagon 2

Claisse M4

Claisse LeDoser-12

Claisse LeDoser

Claisse LeNeo Claisse TheOx Advanced Claisse Eagon 2 Claisse M4 Claisse LeDoser-12 Claisse LeDoser

Keeping ahead through Claisse expertise in fusion

Electric fusion instrument for XRF, AA & ICP analysis

Fully automatic fusion machine for XRF analysis

The standard in sample preparation by fusion

Just-in-time weighing for optimal precision and repeatability!

Weigh and dispense borate flux with high precision

More details More details More details More details More details More details
Heating mode Electric Electric Electric Gas
Number of samples per fusion cycle 1 6 2 3
Productivity Glass disks (XRF) : up to 4 per hour; Borate and peroxide solutions (ICP-AA): up to 6 per hour Glass disks (XRF): up to 24 per hour; Borate and peroxide solutions (ICP-AA): up to 36 per hour Glass disks (XRF) : up to 8 per hour Glass disks (XRF): up to 12 per hour; Borate solutions (ICP-AA): up to 24 per hour Runs autonomously for up to 250 weighings (depending on quantity of flux) Runs autonomously for up to 250 weighings (depending on quantity of flux)