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Table of Contents
Summary of Contents for PIKE Technologies HATR
- Page 1 HATR Horizontal ATR Accessory...
- Page 2 This publication may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of PIKE Technologies, Inc. nor the rights of others. PIKE Technologies, Inc. does not assume any liability arising out of any infringements of patents or other rights of third parties.
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Page 3: Table Of Contents
Liquids ................................9 Solids ................................10 Theory ................................. 11 Materials ..............................13 Precautions ..............................14 HATR Plate Options ............................. 15 Flat Plate ..............................15 Trough Plate ............................15 RCPLATE™ ............................... 15 Flow-Through Cell ........................... 15 Replacement Parts and Options ......................... 16 Regulatory Compliance .......................... -
Page 4: Introduction
Introduction The PIKE Technologies Horizontal ATR (HATR) is a low cost, high throughput ATR accessory designed for use in your FTIR spectrometer. The compact design employs a pair of transfer optics to direct the infrared beam to one end of an IR transmitting ATR crystal. A similar pair of optics directs the beam emitted from the other end of the ATR crystal to the spectrometer detector. -
Page 5: Unpacking Your Accessory
Unpacking Your Accessory In order for you to quickly verify receipt of your accessory, we have included a packing list. Please inspect the package carefully. Packing List HATR Manual HATR Base Assembly HATR Pressure Clamp* PN 350-002200 PN 022-19XX PN 022-3050... -
Page 6: Installation
2. Mount your accessory into the sample compartment using the captive hardware provided on the baseplate. 3. In alignment mode, check the signal throughput of the spectrometer with the accessory in place. Figure 2. Typical HATR with volatiles cover, pivot pressure clamp, trough plate and flat plate. PN 350-002200-07 P a g e... -
Page 7: Performance Verification
Performance Verification 1. With the accessory removed from the sample compartment, collect a background spectrum. 2. Place the HATR accessory in the instrument. 3. Collect a transmission spectrum using the same collection parameters as used to collect the background spectrum. -
Page 8: Flat Crystal Plate
Care is required when removing the sample from the trough. It is required that the sample be removed without scratching the surface of the crystal. Note that the crystal used in the accessory can be made from a variety of materials, many of which are soft and brittle. Scratches on the surface of the crystal will result in a reduction in the throughput of the accessory. -
Page 9: Volatiles Cover
30 °C. So for a crystal at room temperature, the sample may be at a temperature of up to 50 °C. Please contact PIKE Technologies if you wish to place samples of a higher temperature on the crystal surface. Heated HATR plates are also available and can be heated up to 120 °C. -
Page 10: Atr Spectra
ATR Spectra ATR spectra are similar to transmission spectra. A careful comparison of ATR spectra and transmission spectra reveals that the intensities of the spectral features in an ATR spectrum are of lower absorbance than the corresponding features in a transmission spectrum and especially in the high wavenumber (short wavelength) region of the spectrum. -
Page 11: Atr Correction
However, simply placing the thick sample on the ATR crystal and applying pressure generates a high quality spectral result (upper red spectrum) - identified by library search as a polybutylene terephthalate. The total analysis time for the thick polymer by ATR was less than 1 minute. ATR Correction If an ATR spectrum representative of a transmission spectrum is desired, the ATR spectrum must be processed with the ATR correction program available on your instrument. -
Page 12: Liquids
Liquids Two, one minute, 4 cm resolution spectra of dishwashing liquids were collected using a trough plate configuration. There is an apparent difference between the purely water based and alcohol containing detergents. 1800 1600 1400 1200 1000 Wavenumber (cm-1) Figure 7. Comparison of liquid detergents. Two, one minute, 4 cm spectra were collected using a trough plate crystal. -
Page 13: Solids
Solids The spectrum below is of a plastic bottle. A section was cut out of the bottle and analyzed using a flat plate configuration. The sample was kept in contact with the ATR crystal using the pressure clamp. The acquisition time was one minute at a resolution of four wavenumber. 3500 3000 2500... -
Page 14: Theory
Theory How ATR Works With ATR sampling we direct the IR beam into a crystal of relatively higher refractive index. The IR beam reflects from the internal surface of the crystal and creates an evanescent wave, which projects orthogonally into the sample in intimate contact with the ATR crystal. Some of the energy of the evanescent wave is absorbed by the sample and the reflected radiation (some now absorbed by the sample) is returned to the detector. - Page 15 Below is a table giving depth of penetration in microns as a function of crystal material. The penetration depth is calculated for a sample with a refractive index of 1.40 at 1000 cm with a 45° angle of incidence. Material Refr.
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Page 16: Materials
Materials The following HATR crystal materials are available: Material Refractive Index at 1000 cm Spectral Range (cm Safe pH Zinc Selenide 20000-630 AMTIR (As/Se/Ge) 11000-630 Germanium 5500-780 1-14 Silicon 8300-1500 1-12 KRS-5 2.37 17900-400 Zinc Selenide ZnSe is the preferred replacement for KRS-5 for all routine applications. Its useful spectral range is less at the low frequency end than that of KRS-5, but the mechanical strength of this rigid, hard crystalline material is superior. -
Page 17: Precautions
Precautions Mirrors In order to provide the maximum transmission in the infrared, with the minimum spectral interferences, the mirrors used in this device are uncoated (bare) aluminum on a glass substrate. Since the coatings are soft, care must be taken to avoid damage. Normally, these mirrors will not need cleaning, since they are contained within the housing of the accessory. -
Page 18: Hatr Plate Options
HATR Plate Options All HATR ATR plates are pin-mounted to the HATR base with no alignment required. Crystal plate changeover is rapid, allowing a wide range of samples to be analyzed with maximum convenience. The HATRs have been optimized for maximum optical throughput and excellent quality spectra can be obtained from demanding samples. -
Page 19: Replacement Parts And Options
Replacement Parts and Options The following parts and options may be ordered for the HATR accessory: Part Number Description 022-19xx HATR, Base Assembly (w/o crystal plate) 022-3050 HATR Pressure Clamp 022-3051 HATR Volatiles Cover 022-3052 HATR Powder Press 022-3054 HATR High Pressure Clamp 022-4010 500µ... -
Page 20: Regulatory Compliance
Regulatory Compliance We hereby declare that this product conforms to the following standards: Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use – Part 1: General Requirements [IEC 61010-1:2010 Ed.3+A1] Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use Part 2-010: Particular Requirements For Laboratory Equipment For The Heating Of Materials [IEC 61010-2-010:2003 Ed.2] Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory...
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