Optical detection systems are used in spectroscopy, and the system you choose is determined by your application. Flowcell systems allow a fluid sample to travel through a pathway past the detectors. A dipping probe is placed inside a liquid sample to test it. Our detection systems include optical fibers, spare parts and cleaning kits.
Flow cell systems are available for both ultraviolet and visible light spectra.
- WPI’s Liquid Waveguide Capillary Cells are made of fused silica tubing with an outer coating of a low refractive index polymer. Your liquid sample is guided through the capillary and represents the core of the waveguide. The hydrophilic character of the fused silica capillary inner wall results in high signal stability and easy removal of air bubbles trapped in the flow cell. However, the transmission of the LWCC is mainly dependent on the intrinsic attenuation of the sample liquid. In case of water, a usable wavelength range from 250 nm to 720 nm wavelength can be observed in a 100 cm pathlength LWCC. Using a 500 cm pathlength LWCC will reduce that transmission range from 300 nm to about 700 nm. However, when switching from water to methanol as a solvent, transmission into the NIR are possible with suitable light sources and detectors.
- MicroLWCC is a new fiber optic low volume flow cell for UV/VIS/NIR absorbance analysis. Based on WPI’s established liquid core waveguide technology, the analyte solution functions as the core of a fluid filled light waveguide. Wetted parts in the sample cell light path are PEEK, fused silica and PTFE. Optical fibers are used to transport light to and from the sample cell. The cell can be used in biochemistry for DNA, RNA & protein quantification, colorimetric nutrient and trace metal analysis, drug discovery and dissolution testing, process control, and HPLC analysis.
- These are unique multiple long pathlength sample cell systems for absorbance spectroscopy.