PASCO's updated Polarimeter measures the optical rotation of chiral compounds and features BLE bluetooth connectivity.
- 1x Polarimetry Sample Cell Replacement
PASCO’s Polarimeter has both low energy Bluetooth® and USB connectivity, so it works on your iPad®, Chromebook™, tablets, and computers. It is ideal for introductory Organic and Biochemistry experiments with chiral compounds. Plane polarized light passes through a vertical sample of solution then through an analyzer and a detector. Finding the angle from start to where the optimum light is transmitted through the cross polarizer gives the optical rotation. The rotation can be used to calculate concentration and the amount turned per g/ml dissolved (specific rotation) is an intrinsic property that can be used to differentiate molecules or determine racemic mixtures.
How It Works
The speed of light around chiral atom centers is anisotropic (slower for light vibrating in one dimension than that at 90 degrees). This causes a component of the oscillation, say the horizontal portion, to slow down causing the composite plane of oscillation to rotate as it passes through the solution. A second polarizing film is rotated until a maximum amount of light makes it through to the detector. The angle from initial orientation to where it was deflected is considered the optical rotation. A single color of light is used because much like red light refracts less than violet through a prism, in an optically active solution, red is rotated less than orange, less than green, then blue and violet. This can be observed in the polarizer demo set (OS-9477A) as a solution of Karo syrup changes color between the two larger polarizers from red to violet as the cross polarizer is rotates to let the next color through the appropriately aligned color.
|Connectivity||Bluetooth and USB|
|LED light source||589 nm|
|Optical Rotation Accuracy||±0.09º|
|Cell Length||101.3mm ± 0.8mm|
Battery & Logging
|Battery connected (Data collection mode)||> 11 hr|
|Remote logging||Not supported|
|Stored Data Points Memory (Logging)||Not supported|
1 Minimum # of data points with all measurements enabled, actual results depend on enabled measurements.
2 Continuous use in a connected state until battery failure, actual results will depend on sample rate, active measurements, and battery condition.
3 Logging until battery failure, actual results will depend on sample rate, active measurements, and battery condition.
* Normal classroom use is the sensor in active use for 20min/lab for 120 lab periods/yr.
This product requires PASCO software for data collection and analysis. We recommend the following option(s). For more information on which is right for your classroom, see our Software Comparison: SPARKvue vs. Capstone »
This product can connect directly to your computer or device with the following technologies. No Interface required. See the following guide for details regarding device compatibility: Wireless Bluetooth Product Compatibility »
Perform the following experiments and more with the Wireless Polarimeter.
Visit PASCO's Experiment Library to view more activities.
Use a polarimeter and Biot's law to determine the unknown concentration of several sucrose solutions.
|Polarimeter PS-3237 Quick Start Guide||English - 251.95 KB|