Device built-in

Varian 720 ES ICP-OES Spectrometer Introduction

The Varian 720 ES ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) is a high-performance full-spectrum direct-reading spectrometer developed by Varian (now part of Agilent Technologies), specifically designed for simultaneous multi-element determination in environmental monitoring, food safety, geological mining, and material analysis applications. Featuring an innovative echelle grating cross-dispersion optical system, this instrument provides laboratories with high sensitivity and multi-element simultaneous analysis capabilities.

Core Technical Features

The 720 ES ICP-OES adopts a full-spectrum direct-reading design, comprising three key modules:

1. Plasma System:

• Standard 27.12 MHz free-running solid-state RF generator with power range 700-1500W
• High-efficiency torch design with argon consumption as low as 12L/min
• Switchable axial/radial viewing modes for different concentration ranges

2. Optical System:

• Echelle grating cross-dispersion optical structure with resolution <0.007nm@200nm
• Wavelength range 167-785nm covering all elemental characteristic lines
• Patented PurgeAir technology reduces atmospheric absorption interference

3. Detection System:

• High quantum efficiency CCD detector with pixel resolution of 0.003nm
• Dynamic range up to 10⁹ for simultaneous detection of high/low concentration elements
• Full spectrum acquisition speed up to 1.5 seconds per reading

Performance Advantages

The 720 ES ICP-OES offers several industry-leading technical specifications:

1. Multi-Element Simultaneous Analysis:

• Simultaneous analysis of over 70 elements in a single measurement
• Typical detection limits at ppb level (e.g., Cd 0.1ppb)
• Patented Fast Sequential mode improves analysis efficiency

2. User-Friendly Operation:

• Automatic wavelength selection simplifies method development
• Intelligent torch positioning system enables automatic alignment
• Standard ICP Expert II software supports 21 CFR Part 11 compliance

3. Economic Operation:

• 30% lower argon consumption compared to similar instruments
• Solid-state generator efficiency >75% with lower energy consumption
• Extended maintenance intervals significantly reduce operating costs

Key Application Areas

With its outstanding performance, the 720 ES ICP-OES excels in:

• Environmental Monitoring: Heavy metal analysis in surface water and wastewater (compliant with EPA Method 200.7)
• Food Safety: Trace and hazardous element detection in food (GB 5009 series standards)
• Geological Mining: Major and trace element determination in ores and minerals
• Petrochemicals: Metal content analysis in lubricants and catalysts
• Materials Science: Impurity element detection in high-purity materials

For environmental water samples, the system can complete analysis of 23 heavy metal elements within 5 minutes. In edible oil testing, detection limits for Pb, As, Hg and other elements meet GB 5009.268-2016 requirements.

The Varian 720 ES ICP-OES represents a mature solution for full-spectrum direct-reading ICP-OES technology. Its innovative optical design and intelligent workflow provide laboratories with efficient tools for elemental analysis, making it particularly suitable for testing institutions requiring high-throughput sample analysis.