48 Position MULTIVAP Nitrogen Evaporator

Significance of the Topic

The concentration and evaporation of solvent samples are critical steps in analytical workflows across environmental, pharmaceutical and food laboratories. Efficient and uniform sample processing enhances throughput, preserves sample integrity and reduces solvent usage and costs. The 48 Position MULTIVAP dry block nitrogen evaporator addresses these challenges by combining controlled heating with nitrogen blowdown in a high-throughput format.

Objectives and Overview

This document presents the design, features and performance of the 48 Position MULTIVAP evaporator (Catalog# 11848). It aims to highlight how this instrument supports optimal sample concentration for tube sizes from 10 to 22 mm outer diameter and accommodates a range of analytical applications requiring gentle heating and nitrogen-assisted evaporation.

Methodology and Instrumentation

The MULTIVAP system integrates:

• Aluminum dry block heating up to 120 °C, controlled digitally within ±2 °C.
• A 6×8 nitrogen distribution manifold with individual row toggle switches to conserve gas flow when rows are idle.
• An adjustable flow meter (0–25 LPM) and built-in gas regulator (30–110 psi) to fine-tune nitrogen delivery.
• Custom-machined heat block inserts to fit sample tubes (10–22 mm OD) and ensure uniform heat transfer without sample transfers.
• Stainless steel 19 ga needles (4 in/102 mm) guided by an alignment fixture for precise positioning over each tube.

The standard package includes one set of heat block inserts and a needle guide. Optional accessories include additional insert sets (single or sets of 48) and acid-resistant coatings or positive-pressure purge enclosures.

Main Results and Discussion

Performance testing demonstrates rapid and consistent heating across all 48 sample positions, achieving target temperatures up to 120 °C with minimal deviation. The nitrogen blowdown accelerates solvent removal, especially for high-boiling solvents, reducing evaporation times. The toggle-switch manifold design effectively conserves nitrogen by isolating unused rows. Custom inserts eliminate cross-contamination risks associated with vial transfers and improve overall operational efficiency.

Benefits and Practical Applications

Key advantages of the 48 Position MULTIVAP include:

• High throughput processing of up to 48 samples simultaneously.
• Versatility across a range of tube diameters without requiring sample transfers.
• Precise temperature control protecting thermally sensitive analytes.
• Efficient nitrogen usage via adjustable flow control and row isolation.
• Modularity through optional coatings and inserts to meet specialized laboratory needs.

These features make the instrument well suited for environmental analysis, residue studies, pharmaceutical impurity profiling and any routine QA/QC tasks requiring reliable evaporation.

Future Trends and Applications

Ongoing developments may include integration with robotic sample handling for fully automated evaporation workflows and advanced software interfaces for remote monitoring and data logging. The adaptation of inert purge enclosures and advanced materials for heat blocks could expand the range of compatible solvents and sample matrices. Increased modularity and connectivity will support integration into networked laboratory ecosystems and smart lab environments.

Conclusion

The 48 Position MULTIVAP nitrogen evaporator offers a robust, high-capacity solution for solvent evaporation in analytical laboratories. Its combination of precise heating, efficient nitrogen blowdown and modular design delivers consistent performance and operational flexibility. This instrument streamlines sample preparation workflows, reduces solvent use and supports a broad spectrum of analytical applications.