874 Oven Sample Processor

Significance of the Topic

The accurate determination of water content in samples is essential across pharmaceutical, chemical and food industries. The 874 Oven Sample Processor automates thermal pre-treatment, enabling precise release of bound or sparingly soluble water that is otherwise inaccessible at ambient conditions.

Objectives and Product Overview

The 874 Oven Sample Processor (Order no. 2.874.0120) is designed to streamline Karl Fischer titration workflows by automating sample heating and transfer. Its scope of delivery provides all necessary components for a fully sealed system, while a range of optional accessories extends its versatility for diverse analytical applications.

Methodology and Instrumentation

The oven method heats samples to elevated temperatures, ensuring complete liberation of water which is then carried into the titration cell by a dry gas stream. Key delivered items include:

• Heating tube stopper for coulometric KF vessels
• Drying bottle (100 mL) with GL 45 screw cap and matching filter tube
• FEP tubing (multiple lengths) with light and kink protection
• Sample rack for 36×6 mL vials
• Needle holders with Luer lock
• USB A–mini-DIN 8-pin controller cable

Main Features and Discussion

The processor offers programmable temperature control, efficient gas-tight sample transfer and compatibility with Metrohm KF titrators. Optional modules such as the 800 Dosino, additional Titrandos and stirrers allow integration of dosing and agitation steps. The system supports trace-level detection (µg range) and high throughput by accommodating up to 36 samples per run.

Benefits and Practical Applications

• Improved reproducibility for samples releasing water only at elevated temperatures
• Reduced manual handling and risk of contamination through full automation
• Adaptable to a wide variety of matrices, including solids, viscous liquids and polymers

Future Trends and Potential Applications

Emerging developments may include integration with laboratory information management systems (LIMS) and advanced analytics platforms. Future enhancements could feature inert gas operation, higher temperature capabilities and robotic sample loading for fully unattended workflows.

Conclusion

The 874 Oven Sample Processor delivers reliable, automated thermal sample preparation for Karl Fischer titration, addressing the needs of modern analytical laboratories for precision, efficiency and versatility.

Used Instrumentation

• 874 Oven Sample Processor (2.874.0120)
• Heating tube stopper (6.1446.170)
• Drying flask cap (6.1602.145) and drying bottle 100 mL (6.1608.050)
• FEP tubing (6.1805.010; 6.1805.050; 6.1805.470)
• Thread and tubing adapters (6.1808.040; 6.1808.050)
• Filter tube (6.1821.040)
• Sample rack, 36×6 mL (6.2041.720)
• Needle holders with Luer lock (6.2049.040; 6.2049.050)
• USB A–mini-DIN 8-pin cable (6.2151.000)
• Safety shield (6.2751.140)
• Molecular sieve, 250 g (6.2811.000)