| Description |
Details
Liquid Waveguide Capillary Cells (LWCC) are fiber optic cells that combine an increased optical pathlength (2–500 cm) with small sample volumes (12.5–500 mL). 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. According to Beer’s Law the absorbance signal is proportional to chemical concentration and light path length. Compared with a standard 1 cm cell, a 1 mAU signal is enhanced fifty-fold with a 50 cm cell to 50 mAU, using WPI’s patented aqueous waveguide technology. The LWCC can be connected directly to a pump or can even be filled using a syringe. Based on fiber optics, the LWCC is designed for use with WPI’s Tidas I or SpectraUSB spectrophotometer systems. Further, modular sample systems can be assembled using SpectraUSB spectrometer modules and WPI’s range of UV/VIS light sources D2H and FO-6000 (see pages 25
Applications
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. WPI’s Liquid Waveguide Capillary Cells are made of fused silica tubing with an outer coating of a low refractive index polymer. This results in high signal stability and easy removal of air bubbles trapped in the sensor cell due to the hydrophilic character of the cell wall. These unique instruments were invented, patented and optimized by WPI during the last seven years of research in this field. They feature a number of advantages over conventional absorbance cells and flow cell arrangements. Designed for use with fiber optics, they require only small sample volumes and have a high optical throughput. |
| Specifications |
Additional information not available |
| Manuals and Resources |
Instruction Manual
lwcc-im-040208.pdf |
| References |
E. Johnson, J. Ringo, H. Dowse. "Native and heterologous neuropeptides are cardioactive in Drosphilia melanogaster." J of Insect Physiology 46. 2000: 1229-1236.
J.Z. Zhang, J. Chi. "Automated Analysis of Nanomolar Concentrations of Phosphate in Natural Waters with Liquid Waveguide." Environmental Science Technology 36. 2002: 1048-1053.
J.Z. Zhang. "Enhanced Sensitivity in Flow Injection Analysis Using a Long Pathlength Liquid Waveguide Capillary Flow Cell for spectrophotometric Detection." Analytical Sciences 22. 2006: 57-60.
A. Marechal, T.A. Mattioli, D. J. Stuehr, J. Santolini. "Activation of Peroxynitrite by Inducible NO-Synthase: A Direct source of Nitrative Stress." J. Biol Chem 11. 2007: 14101-14112.
V.R. Zhelyaskov, S.Y. Liu, M.P Broderick. "Analysis of nanoliter samples of electrolytes using a flow-through microfluorometer." Kidney International 57. 2000: 1764-1769.
J.Z. Zhang, C. Kelble, F.J. Millero. "Gas-segmented continuous flow analysis of iron in water with a long liquid waveguide capillary flow cell." Analytica Chimica Acta 438. 2001: 49-57.
J. Gresh, P.W. Goletz, R. K. Crouch, B. Rohrer. "Structure-function analysis of rods and cones in juvenile, adult, and aged C57BL/6 and Balb/c mice." Vvisual Neuroscience 20. 2003: 211-220.
Comment by: R.H. Byrne, E. Kaltenbacher. "Use of liquid core waveguides for long pathlength absorbance spectroscopy: Principles and practice." Limnol. Oceanogr 46. 2001: 740-742.
K.S. Johnson, L.J. Coletti. "In situ ultraviolet spectrophotometry for high resolution and long-term monitoring of nitrate, bromide and bisulfide in the ocean." Deep Sea Research I 49. 2002: 1291-1305.
P. Dress, H. Franke. "Increasing the accuracy of liquid analysis and pH-value control using a liquid-core waveguide." Rev. Sci. Instrum 68. 1997: 2167-2171.
M. Belz, P.Dress, A. Sukhitskiy, S. Liu. "Linearity and effective optical pathlength of liquid waveguide capillary cells." SPIE Conference on Internal Standardization and Calibration Architectures for Chemical Sensors 3856. 1999: 271-281.
G.J. Kirkpatrick, O.M. Schofield, D.F. Millie, M.A. Moline. "Optical Discriminationof a Phytoplankton Species in Natural Mixed Populations." Mote Marine Laboratory et al. . 1995-1997: .
Comment. "Use of liquid core waveguides for long pathlength absorbance spectroscopy: Principles and practice." Limnol, Oceanogr. 46. 2001: 740-743. |
| Ordering Information |
To place an order for this product, please contact the appropriate WPI office or distributor.
Customers can order direct from our China office:
WPI China
Address: Rm.20A, No.8 Dong Fang Rd, Liang Feng Building, Lu Jia Zui Financial District, Shanghai PRC
Phone:+86 21 68885517
Fax:+86 21 68885537
Code:200120
|
| Accessories |
58006 - Sample Injector Assembly
PERIPRO-4L - Peri-Star Pro 4-channel, low rate pump
FO-400-SMA1M - Fiber Optic Cable 1m, SMA, 400 um core
501609 - Waveguide Cleaning Kit
KITLWCC - LWCC Start-up Kit
58450 - Kit, Adapter Syringe, LWCC |
| Application Notes |
Application Notes
No Application Notes available for this product at this time. |
|
