The Hellma TrayCell is a fibre-optical ultra-micro measuring cell designed for measurements e.g. of DNA/RNA or protein samples and enables highly accurate analysis of extremely small samples with remarkable reproducibility. The dimensions of the TrayCell are equivalent to a standard cuvette in order to work in most spectrophotometers. Using the 1 mm or 0.2 mm cap creates a defined optical light path of 1 mm and 0.2 mm respectively. This generates virtual dilution factors of 1:10 or 1:50 in comparison to a measurement with a standard 10 mm cuvette. This feature saves time and avoids dilution errors. If desired, samples can be retrieved after the measurement for further processing. The required sample volume for the 1 mm cap is 3 µl to 5 µl and for the 0.2 mm cap 0.7 µl to 5 µl. Due to the integrated beam deflection and the use of fibre-optic cables it is possible to measure the sample directly on the surface of the optical window. The cap with mirror provides a well-defined optical light path and prevents the sample from drying up. The measurement remains reproducible because the sample will not be enriched by evaporation of the solvent. During filling and cleaning stages, the TrayCell remains in the spectrophotometer. This guarantees a continuously identical position of the aperture in the light beam and no variation in comparison to the reference measurement.
Applications
Nucleic acid analysis
Determination of the incorporation frequency of fluorescent dye labels (FOI)
Protein analysis (A280, BCA, Bradford, Lowry etc.)
All UV/Vis analysis utilizing the wavelength range of 190 to 1100 nm
Features
Unique fibre optic ultra-micro measuring cell
Works with 0.7-5 µl sample volume
A single drop measuring sample is sufficient
Highest precision and reproducibility
Dilution is not necessary
Flexible operation - can be used with all common photometers
Best measurement performance
Sample can be recovered after measurement is taken
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