The Pike Veemax III with ATR
The VeeMAX III with ATR offers continuous variable angle of incidence and a variety of crystal plates to selectively control the depth of penetration of the IR beam into the sample. The design allows for constant purge, which is not broken upon sample loading, and an integrated polarizer slot. ATR applications include the study of layered samples, coatings, release agents, monolayers on silicon and chemical migration studies. The new electrochemical cell add-on is also available to be used with the VeeMAX.
- Variable angle of incidence for depth profiling
- High throughput and wide selection of ATR crystal types available
- Electrochemical cell option
- Temperature control option
ATR applications include the study of layered samples, coatings, release agents, monolayers on silicon and chemical migration studies. The VeeMAX III with ATR accessory provides exceptionally high throughput (over 50% with 45 degree ZnSe crystal) to minimize sampling time and enable detection of low concentration components in samples of complex composition.
The flat plate crystals offered for the VeeMAX III are ideal for solid and layered samples and are designed for use with the optional pressure clamp.
The combination of large crystal diameter (20 mm) and slip-clutch pressure clamp provides sample to crystal contact without altering layered sample composition.
The optional liquids retainer may be added to the crystal plate for analysis of liquid samples. Monolayers and ultra-thin films absorbed on silicon or gold substrate are easily sampled using the VeeMAX III equipped with a high refractive index ATR crystal.
Compared to specular reflectance sampling for monolayer analysis, an increase in sensitivity of up to 1–2 orders of magnitude may be realized via ATR sampling. For these applications, the VeeMAX III accessory is configured to include a high-angle Ge flat plate (60° or 65°), the VeeMAX III high-pressure clamp with a 7.8 mm pressure tip, and a polarizer.
A spectroelectrochemical cell option for the VeeMAX III is also available. The innovative design offers a polytetrafluoroethylene cup sealed to an ATR crystal, which is mounted on the VeeMAX.
The crystals are interchangeable for optimizing spectral results and are removable to allow electrode coating on the ATR surface.
The high throughput of the VeeMAX with ATR provides excellent sensitivity and reduced sampling time.
Additionally, a flat IR transparent window may be installed instead to permit specular reflectance sampling.
The electrochemistry cell is equipped with a precision micrometer for electrode positioning.