World Precision Instruments Liquid Waveguide Capillary Cell for Spectrometer WPI

Description

I am selling my liquid waveguide capillary cell from World Precision Instruments, the LWCC-2500. You can read all about the specifications in Photo 11, and you can read more about different applications of this scientific instrument below.
I've also used it myself personally so if you have any questions please don't hesitate to contact me.  Thank you.
I have been an eBay member since 2001 with excellent positive
feedback.  If you have any questions please scroll up and click "contact seller".
Benefits
Adapts to most fiber optic detection systems
20 years of manufacturing experience
Low UV drift
Applications
Trace detection of nutrients (nitrite, nitrate, phosphate, iron) in seawater
Environmental and oceanographic monitoring
Drinking water analysis
Colored dissolved organic matter (CDOM)
Process control
UV/VIS/NIR absorbance spectroscopy is governed by Beer’s Law, where the absorbance signal is proportional to chemical concentration, light path length and the compound’s specific molar absorption coefficient. Typical optical pathlengths of cuvettes and flow cells are between 0.2cm and 10 cm. Longer pathlengths are difficult to achieve due to mechanical constraints. Liquid Waveguide Capillary Cells (LWCCs) fill this gap. LWCCs are fiber optic flow cells that combine an increased optical pathlength (10–500 cm) with small sample volumes ranging from 2.4 µL to about 3mL. Compared with a standard 1cm cell, a 1 mAU signal is enhanced one hundred fold with a 100 cm flowcell to 100 mAU, using WPI’s patented aqueous waveguide technology.* They can be connected via optical fibers to a spectrophotometer with fiber optic capabilities. Ultra-sensitive absorbance measurements can be performed in the ultraviolet (UV), visible (VIS) and near-infrared (NIR) to detect low sample concentrations in a laboratory or process control environment.
Your sample is the core of a light guide
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.
Applications
WPI’s LEDSpec detection system can be used for monochromatic light detection. For example, you may use it for nitrite analysis at 540 nm with up to four (4) LWCCs per instrument. When the entire spectral shape of an absorbance curve is required for analysis, WPI’s TIDAS E Base spectrometer with a D4H or a FO-6000, or the TIDAS S300 spectrophotometer can be used. LWCCs have been used in a variety of applications, such as liquid chromatography, stopped-flow and colormetric detection, drinking water analysis, as well as environmental and oceanographic monitoring systems. Accessory: LWCC Injection System For flow analysis, including simple fluid injection analysis (FIA) setups, add WPI’s LWCC injection system (89372). A selection valve provides baseline or cleaning solutions to the sample stream. The injection valve injects a sample into the stream, avoiding the introduction of air bubbles or changes of flow rate.