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Instrument Database:
CHEMTECH AI LIMITED - CTA 1900 Double Beam UV Spectrometer
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| Year of introduction |
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| Status |
available |
| Company |
CHEMTECH AI LIMITED
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| Categories |
Spectrometer ( Molec. ): UV/VIS
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The CTA 1900 and CTA 1901 is our company's highest performing research-grade UV-VIS spectrophotometers. Its optical system utilizes a double- beam dynamic feedback ratio photometric recording system, a unique full-transmission/full-reflection design, and a highly sensitive photomultiplier tube as a detector. All operations are controlled through the PC: automatic wavelength control, automatic switch light-source control, and automatic spectrum bandwidth control (CTA1900 has set spectrum bandwidth).
This instrument features easily interchangeable holder accessories and an open-type light source chamber design. The software is operated under the WINDOWS platform. The CTA1900s UV-VIS spectrophotometers perform photometric measurements, spectrum measurements, and quantitative measurements. It is easily operated, features excellent performance, automatic 900nm-190nm wavelength scan, automatic peak-picking. Its convenient and easy data processing is very suitable for medical, chemical, environmental, agricultural, or biological analytical work.
Excellent performance. High-performance blazed holographic grating and the optimized CT-type monochromator minimizes stray light and widens the photometric range in the CTA-1900s.
Ideal baseline stability. Double-beam dynamic feedback ratio photometric recording system reasonably coupled with an advance design electric control system ensures high stability of the instrument baseline.
High resolution. The unique optic design of full-transmission and full-reflection will guarantee a clean separation of the light source into a double beam while at the same time energy enhancement will maintain the light energy of both beams. This design reduces noise and guarantees high resolution.
Accurate wavelength. The automatic wavelength system and the automatic light-source interchange systems ensure wavelength accuracy and high holistic performance of instrument.
Easy accessories replacement. The detachable design of the sample chamber easily facilitates exchange of a wide range of optional accessories and ensures satisfactory analysis of various kinds.
User-friendly arrangement. The open design of the light source chamber, socket deuterium lamp and socket tungsten halogen lamp facilitates easy light source replacement, easy maintenance, and reduces operation error.
Versatile application software. The CTA-Win application software is made in the Windows format, offering an extended range of instrumental control and data processing.
Quality components. Many key components are chosen from some of the world’s best manufacturers; these include the deuterium lamp, PMT and holographic grating. Careful selection of these components ensures the instrument’s dependability, accuracy, and maximizes lifespan.
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| Specifications |
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Optical System:
Czerny-Turner(C-T) type monochromator, with high-resolution, diffraction holographic grating.
Wavelength range 190nm ~ 900nm
Spectral bandwidth 0.1 nm, 0.2 nm, 0.5nm, 1.0 nm, 2.0 nm and 5.0 nm (6 option, automatic changeover for CTA-1901)
2.0 nm (set bandwidth for CTA-1901)
Stray light 0.02%T (220nm NaI)
Wavelength accuracy +/-0.3 nm (automatic calibration)
Wavelength reproducibility 0.1nm
Light source interchange Automatic light source change
Photometric system: double-beam ratio recording system
Photometric method Transmittance, absorbance, reflectance, energy, concentration.
Photometric range -0.4~4.0Abs
Photometric accuracy +/-0.3%T (0~100%T), +/-0.002Abs (0~0.5 Abs), +/-0.004Abs (0.5~1.0 Abs)
Photometric reproducibility 0.001Abs (0~0.5Abs), 0.002Abs (0.5~1.0 Abs)
Baseline flatness +/-0.001Abs
Baseline stability 0.0004Abs/h (500nm, after preheating)
Software: CTA-UVWin, a windows-operated software system
Photometric measurement
Measuring the transmittance or absorbance of 1-10 wavelengths, with the capacity to make mathematical calculations according to set formula.
Spectrum scanning
Carrying out scanning of transmittance or absorbance spectral curves with the capacity to handle such data as peak value checkout, derivative spectrum and spectrum calculation.
Quantitative determination
Single, dual, triple wave-lengths and microanalysis, with up to 20 points 1-4 times curvilinear regression.
Kinetic Measurements
Time scanning of transmittance or absorbance on 1 to 10 specified wavelengths and handling data such as peak value checkout, spectral microanalysis and spectral calculation.
Result delivery
Survey results from data or parameter file access, may be transmitted to other file processor or electronic tabulator for report generation.
Mainframe: Well-designed high-performance spectrophotometer
Light Source
Socket deuterium lamp and socket tungsten lamp (with no adjustment needed after replacement).
Detector Photomultiplier tube
Sample Chamber
With accessories like a four-cell sample holder and an integrating sphere.
Dimensions 587mm X 562mm X 260mm
Weight 34kg
Other Requirements:
Power Source Voltage 110-230V, frequency 50-60Hz AC
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