Model 180-vial pack – 522/24 (4)7mL, (4)11mL, (4)15mL
180 Vial Pack for FS-522/524
The Model 180 vial pack provides three path lengths to be used with the FS-522/524 Interfaces. The kit includes:
- 4 Vials; (7 mL) 1.46 cm path length
- 4 Vials; (11 mL) 1.67 cm path length
- 4 Vials; (15 mL) 2.25 cm path length
A set of spectrophotometer vials to be used with the FS-522/524 interface. The vials (four of each size) are of three different volumes and path lengths –7mL = 1.46 cm path length, 11 mL = 1.67 cm path length and 15mL = 2.25 cm path lengths.
Smaller vials require less sample and because of their shorter path length, can use more concentrated solutions while still allowing enough light through the sample for reliable absorbance readings.
The three vials can be used to illustrate the effect of the path length variable in Beer’s Law:
A = a*b*C, where A= Absorbance, a = molar absorptivity constant, b = path length, and C = concentration.
Using the same solution, and resetting the blank for each vial path length, students can demonstrate that a plot of Absorbance against path length is a straight line. This indicates that, for a constant concentration and sample identity (molar absorptivity constant), Absorbance is directly proportional to path length.
- Spectral profiles
- Beer’s Law
- Path Length
- Spectrophotometric Kinetics
- Stirred spectrophotometric titrations
- Controlled temperature kinetics