CHEMISTRY: POLARIMETER
Chemical Polarimeter ORDER CODE
CHEM-POL
The Chemical Polarimeter is a device used for measuring the rotation of plane-polarized light caused by an optically active substance, such as an organic, inorganic, or biological compound. The Polarimeter can be used to measure chiral properties of optically active samples without chemically modifying or destroying the sample. This is a vertical polarimeter that uses a 589 nm LED, a fixed polarizer, and a manually rotated polarizer to detect changes in rotation of plane-polarized light. Used with Vernier technology, students no longer have to determine the optical maximum by eye, but instead have a graph that shows a clear change in the light’s polarization.
Activities and experiments that can be performed using this instrument: Analyzing the optical rotation of sucrose using the Polarimeter and LabQuest 2
CHEMICAL POLARIMETER REQUIREMENTS The Polarimeter can be used with the following interfaces: • Vernier LabQuest as a standalone device or with a computer • Vernier LabQuest Mini with a computer • Vernier LabPro with a computer • TI-Nspire Lab Cradle with a TI-Nspire • Vernier SensorDAQ The Polarimeter can be used with an interface and the following data-collection software: • Logger Pro – This computer program is used with LabQuest, LabQuest Mini, or LabPro. The Polarimeter requires Logger Pro 3.8.4.2, or newer. • LabQuest App – This program is used when LabQuest is used as a standalone device. The Polarimeter requires LabQuest App 1.6 or newer. • DataQuest – Use with TI-Nspire technology. • LabVIEW – National Instruments LabVIEW™ software is a graphical programming language produced by National Instruments. It is used with SensorDAQ and can be used with a number of other Vernier interfaces. See www.vernier.com/labview/
• Determine sugar solution purity by optical rotation • Characterize the purity of organic and inorganic syntheses yielding chiral products • Determine the enantiometric purity of optically active compounds • Resolve racemic mixtures • Study the kinetics of acid-catalyzed hydrolysis • Study the kinetics of enzyme-catalyzed hydrolysis • Explore the optical activity of amino acids
PRODUCT SPECIFICATIONS Resolution:* 0.25° Light Source: LED Wavelength: 589 nm * This is the resolution of the analyzer. Typical absolute optical rotation measurements have a repeatability of ±1°.
WHAT’S INCLUDED Chemical Polarimeter, one sample cell, user manual
ACCESSORIES Polarimeter Sample Cells (ORDER CODE C E L L S - P O L ) includes four additional sample cells with screen-printed ruler
MORE ONLINE – Downloadable experiments are available for
free online at www.vernier.com/chem-pol
Logger Pro allows easy detection of the optical rotation of compounds like sucrose.
Go to www.vernier.com/chemistry for more curriculum and innovative uses-
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CHEMISTRY
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