Sample and sample cell

Selection of an appropriate sample cell is key to the successful analysis of your sample. WPI prides itself on innovative fiber optic sample cells optimized for a particular application. Nutrient analysis, micro volume protein detection, trace metal analysis, flow colorimetry and dissolution testing are only some of the areas WPI’s cells have been successfully used. Sample properties, volume, analyte concentration, wavelength range and pathlength determine, which of WPI’s unique sample cell you can use in your research.
The table at right provides an overview of WPI’s wide range of optical sample cells and their potential applications.
Cell Type Sample Volume Pathelength (cm) Range* (nm) Application
LWCC Flow cell 2.5 µL/cm 2 to 500 200-1000 Nutrient analysis, trace metal detection, colorimetrics…
UPATH Multiple path flow cell 10 mL 2, 10, 50, 200 230-730 Natural water, CDOM, tank cleaning…
SPT Microliter dipping probe 2 µL 1 230-1000 Protein, DNA/RNA, rhodopsin…
DipTip Miniature dipping probe 30-50 µL 0.2, 0.5, 1 230-1000 Protein, DNA/RNA, rhodopsin, dissolution
MicroVette Single drop injection 4-15 µL 2.3-10 230-1000 Enhanced dynamic range, Protein, DNA/RNA…
CUV-UV
CUV-UV-10
CUV-ALL 		Cuvette holder, 2 & 4 way 0.2-3.5 mL 0.5, 1, 10 200-1000 Absorbance and fluorescence with standard and flow cuvettes
TR600 High efficiency transmission probe 5 mL 0.2, 0.5, 1, 2 200-1000 Colorimetrics, standard lab use, online analysis

 

Choosing a Preconfigured System

WPI offers “complete” pre-configured systems for a variety of applications from protein analysis to flow-through colorimetric detection in the UV-VIS-NIR spectral region. It is to the customer’s advantage to consider purchasing a complete system. Ordering a pre-configured system eliminates the guesswork of ordering parts and offers the best pricing. In addition, each system has many hours of testing in our research labs by WPI’s scientists.
If you are not sure that a complete system is what you need, we recommend calling and speaking with one of our technical product specialists. We can then configure a customized system especially for you with our complete line of spectroscopy products and accessories. Select a detector based on your own individual application. WPI offers a complete range of CCD (silicon linear array) and PDA (photodiode array) modules, in addition to our full-range cuvette-based Tidas II spectrophotometer.
Choosing the right detector will depend upon the accessories you need, budget, and computer interface. WPI offers an array of innovative fiber optic sampling cells. Many are designed and protected by patents issued to WPI. As the table above shows, customers may choose a sensor cell based upon sample volume and detection limits.
System Detector
Detection
Range (nm)
Sample Volume Principle Application(s)
TIDAS1-LWCC PDA 250-730 2.5 µL/cm Nutrient analysis, trace metal detection, water purity
TIDAS-QUAD PDA 230-730 Varies 4-channel detection system
TIDAS1-MV PDA 230-730 4 - 15 µL Protein (DNA/RNA), micro-colorimetry
TIDAS1-SPT PDA 230-730 2 µL Protein (DNA/RNA)
TIDAS1-TIP PDA 230-730 10-30 µL Dissolution studies, multipurpose testing
TIDAS2-LWCC PDA 230-730 2.5 µL/cm Low noise, high sensitivity applications, flow systems
TIDAS2-SPT PDA 230-1000 2 µL Lowest noise/sample volume, full-range, multipurpose
UPVIS (UltraPath) PDA 380-730 10 mL Open ocean (CDOM) detection, broad dynamic range
UPUV (UltraPath) PDA 250-730 10 mL Open ocean (CDOM) detection, broad dynamic range
USB2000-LWCC-VIS CCD 350-730 2.5 µL/cm Colorimetric detection. VIS system
SPECTRAUSB-LWCC-UV CCD 250-730 250 µL Flow thru analysis with UV-VIS capability
SPECTRAUSB-SPT CCD 230-800 2 µL Lowest volume sampling, protein, UV-VIS multipurpose
SPECTRAUSB-MV CCD 230-800 4 - 15 µL Microvolume, multipurpose
SPECTRAUSB-FLG CCD 380-1050 1 - 3.5 mL Fluorescence
SPECTRAUSB-CUV CCD 250-800 0.2 - 3.5 mL Cuvette-based sampling, multipurpose
S2000-MC-x CCD Custom Varies Multichannel applications. Call for technical assistance