The MVP-Pro Star™ is single reflection diamond ATR accessory. It features a convenient horizontal sampling surface with a 1.5mm
diameter sampling area. The MVP-Pro Star is the choice for infrared spectroscopy measurements of extremely hard samples, abrasive
powders and highly corrosive materials. Since the MVP-Pro Star™ is affordable, durable, and straightforward to use, it is an excellent
choice for routine analysis of liquids, solids and powders. Small drops of liquid and minute smears of pastes can be placed directly on
the monolithic diamond ATR crystal. Coatings on wire, paint chips, fabrics, powders, and miniature hard samples can be pressed
against the crystal using the built-in pressure applicator. The MVP-Pro Star™ also features PermaPurge™ for rapid sample exchange
without interrupting the spectrometer purge. The MVP-Pro Star™ diamond ATR makes sampling simple and straightforward.
Applications
- Excellent for studying optically thick, hard samples; slightly curved samples; fibers; paint chips; micro-liters of liquids and pastes; and powders.
- Invaluable for QC applications.
Features
- Monolithic Diamond ATR prism designed for operation from the mid-IR to the FIR.
- Small sampling area: 1.5mm in diameter.
- Convenient horizontal sampling.
- High sample throughput.
- Little or no sample preparation required.
- Excellent retention of sample integrity.
- Readily exchangeable ATR sampling plates.
- Built-in pressure applicator with slip-clutch for for reproducible pressure application.
- Designed to achieve optimal contact between the ATR element and solid samples.
- Harrick's exclusive PermaPurge™ allows rapid sample exchange without interrupting the purge of the FTIR spectrometer.
- Mechanically compatible with the SplitPea™ and Meridian™ crystal holders.
- Options available include:
- Ge, ZnSe and Si hemispherical ATR crystals.
- Heatable sampling plates for operation up to 200°C with diamond or ZnSe ATR crystals, 100°C with Ge.
- Powder Adapter for retaining powdered samples.
- Flow-Through Liquid Cell for static and flow applications.
- Force sensor with digital read-out for precise force measurements.
- Low-torque slip-clutch available.
Includes
- Epoxy-free Diamond ATR sampling plate.
- Built-in pressure applicator.
- Mating hardware for the specified spectrometer
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Crystal
Material | Additional ATR
Sampling Plates | Heated
Sampling Plates |
| Diamond | MVP2-ATR-0W | UNS-HOT-0W |
| Ge | MVP2-ATR-J | UNS-HOT-0J |
| Si | MVP2-ATR-E | UNS-HOT-0E |
| ZnSe | MVP2-ATR-M |
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This MVP-Pro Star™ is a unique horizontal ATR mini-sampler, ideal for analyzing samples that are difficult to analyze by conventional FTIR spectroscopy methods. Such samples include solids such as coatings on slightly curved materials and paints and micro-liters of liquids or pastes.
The MVP-Pro Star™ utilizes all front-surface mirrors to focus the beam to and from the ATR crystal. The MVP-Pro Star features a monolithic diamond ATR prism. This provides a 1.5 mm diameter sampling area on the top of the diamond that can be used for spectroscopic measurements from the mid-IR to the FIR, with limited signal-to-noise in the 2300 cm-1 to 1850 cm-1 region.
The ATR crystal is mounted in a removable sampling plate for easy cleaning and crystal replacement. This sampling plate is part of the purge enclosure around the MVP-Pro Star™ that allows rapid sample exchange without interrupting the purge of the FTIR spectrometer. For applications requiring different penetration depths or chemical resistances, sampling plates with Ge, Si, and ZnSe hemispherical ATR crystals are also available.
Heatable sampling plates are also available for operation up to 200°C with diamond and ZnSe or up to 100°C with a Ge ATR crystal. The Heatable Sampling Plates feature a K-type thermocouple and cartridge heater. These are intended for operation with the Harrick Automatic Temperature Controller.
For making contact with solid and powder samples, the MVP-Pro Star™ is equipped with a built-in pressure applicator with slip-clutch for consistent and reproducible results. For more fragile ATR crystals, i.e. ZnSe and Ge, a compatible low-torque slip-clutch is available. For more precise force measurements, a pressure applicator with built-in force sensor and display is offered.
For easy powder and liquid sampling, an optional Powder Retainer and Flow-Through Liquid Cell are available. Both attach to the sampling plates and are sealed with a Viton o-ring. The Powder Retainer contains the powder in a restricted volume and requires approx. 0.1 ml for operation. The Flow-Through Liquid Cell is a micro-cell with a volume of approx. 0.15 ml and Luer Lok fittings for sample introduction.
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Figure 1. ATR Spectra of Easy-Off™ Oven Cleaner Freshly Applied (top)
and After 1 hr. of Drying (bottom).
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Representative infrared spectra recorded with the MVP-PRO Star™ are shown in Figures 1 through 4. Figure 1 shows the chemical changes in a corrosive cleansing agent as it dries. Over time, the water evaporates and the organic components and NaOH becomes concentrated.
Figure 2 shows spectra of an abrasive cleaner. The pad is impregnated with soap, as shown by the black spectrum. The spectra show that the concentration of soap in the pad is lower after the pad has been used.
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Figure 2. ATR Spectra of an SOS™ Steel Wool Cleaning Pad, New (top), and Dried After Use (bottom).
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Figure 3 shows the ATR spectra of powdered dishwasher detergent. The detergent was a white powder with a low (<1%) concentration of green particles. A few grains of the green grains were separated from the bulk for analysis. The spectra show that the green material differs in composition from the bulk.
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Figure 3. Normalized ATR Spectra of Green Specks in Cascade™ (top) and Cascade™ (bottom).
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Figure 4 shows infrared spectra of the inside and outside of an antihistamine table. The differences between the two are due to a coating on the outside of the tablet.
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Figure 4. ATR Spectra of ChlorTrimeton™ antihistamine, inside of tablet (top) and outside of tablet (bottom).
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The MVP-PRO Star™ diamond ATR is excellent for examining a wide range of samples, including liquids, pastes and solids by FT-IR spectroscopy. It is ideal for analyzing samples that would damage other crystals - highly acidic or basic liquids and extremely hard solids.
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Harrick Scientific Products, Inc.
141 Tompkins Ave, 2nd floor
PO Box 277
Pleasantville, NY 10570 |
Phone: 914-747-7202
Fax: 914-747-7209 |
| E-mail: info@harricksci.com |
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