Outstanding sensitivity is achieved using a high pressure contact against a solid, type IIIa diamond, selected for unparalleled sensitivity and unique physical and chemical stability. The accessory can be used to analyse a range of samples from single particles and fibres to corrosive liquids, while the large working area sample platform is ideal for macro sampling.
The high refractive index of germanium, 4 at 1000cm-1, makes this ATR material an ideal choice for these samples containing high concentrations of carbon black. Optimum sensitivity is achieved using a 4x4 mm germanium crystal cemented into a rugged stainless steel disk for maximum strength and support.
The shallow depth of penetration with no band distortion overcomes difficult quantitative analysis of strongly infrared absorbing materials. Similarly, corrosive samples, thin films and surface coatings can also be analyzed.
Many reactions and processes occur at high temperatures. The Heated Top-plate includes all the normal features of the Golden Gate sampling technique, but it has the added capability of heating samples up to 200 ºC.
High Temperature Top-Plate
Many reactions and processes occur at high temperatures. The High Temperature Diamond Top-plate includes all the normal features of the Golden Gate sampling technique, but it has the added capability of heating samples up to 200 ºC.
Low Temperature Top-Plate
The Golden Gate™ Low Temperature single reflection diamond ATR system is the first ATR accessory to provide high performance ATR measurements down to near liquid nitrogen temperature. The system uses a thermally insulated copper and stainless steel Dewar in conjunction with an integral heater. The high thermal conductivity of the diamond ATR crystal provides rapid temperature stabilisation, accurate temperature measurement and avoids temperature gradients across the sample.
Micro-Specular Reflectance Top-Plate
A 45° angle Micro Specular Reflection Top Plate is for flat samples greater than 2mm x 2mm, or powders that can be pressed into a self-supporting wafer. A scribed reference grid allows accurate repeat positioning of samples.
Reaction Cell Top-Plate
The Reaction Cell allows in-compartment reaction monitoring over a broad range of extreme conditions. The diamond is metal bonded into a tungsten carbide mount and this is contained within a high pressure reaction vessel. The unique strength and durability of the diamond element makes it ideal for withstanding combinations of aggressive chemical contact at high temperatures and pressures.
Supercritical Fluids Top-Plate
The Supercritical Fluids Analyser version of the Golden Gate™ ATR is designed for operation at extreme temperatures and pressures. The high thermal conductivity of the diamond element is ideal for fast temperature equilibrium and accurate temperature measurement, reducing analysis time and increasing sample throughput. The analyser is equipped with a thermal runaway protection system to prevent thermal runaway.