Description
Similar in all respects to the Type 9 Semi Micro cells, with the exception that these cells are supplied with a PTFE stopper, or stoppers as pictured, to fit in a ground fitting to reduce evaporation of volatile samples (The Type 29B comes with stoppers even though the stoppers are not pictured). The Type 29 and Type 29B cells have an external height of 48 mm plus stopper.
Smaller sample volumes can be achieved by using cell Type 29/9 or 29B9 with a 9mm instead of a 3mm thick base.
Note: Cells with a 9mm base are not suitable for an instrument with an 8.5mm 'Z' dimension.
Short Pathlength Spacers
Black anodized aluminum spacers are available in three sizes for use with 1, 2, and 5mm path length cells, supporting them in a normal 12.5 x 12.5mm holder where there is no cell holder path length adjustment facility. SPA-1 (1mm), SPA-2 (2mm), SPA-5 (5mm).
| Description: | Semi-Micro Spectrophotometer Cells, with stopper |
|---|---|
| Physical Configuration: | Walls parallel to the light path thickened, sample chamber is 4mm wide |
| Primary use: | Absorption measurement using reduced volume |
| Clear windows: | Two |
| Instrument: | Can be used with spectrophotometers and colorimeters |
| Pathlengths available: | 5, 10, 20, 40, 50mm |
| Most commonly used path length: | 10mm |
| Cell top: | PTFE stopper in "ground type" joint. Liquid tight for up to 12 hours |
| Usage note: |
Thick base (29/9) can not be used with instruments having a Z dimension of 8.5mm |
Window material: Spectrosil® Quartz or equivalent, useable range: 170 to 2700nm
| Starna Catalog No |
Path Length (mm) |
Exterior Width (mm) |
Exterior Length (mm) |
Exterior Height (mm) |
Interior Width (mm) |
Interior Length (mm) |
Base Thick-ness (mm) |
Nominal Volume (ml) |
Number Polished Windows |
| 29B-Q-5 | 5 | 12.5 | 7.5 | 48 | 4 | 5 | 2.5 | 0.700 | 2 |
| 29B-Q-10 | 10 | 12.5 | 12.5 | 48 | 4 | 10 | 2.5 | 1.400 | 2 |
| 29B/9-Q-10 | 10 | 12.5 | 12.5 | 48 | 4 | 10 | 9 | 1.160 | 2 |
| 29B-Q-20 | 20 | 12.5 | 22.5 | 48 | 4 | 20 | 2.5 | 2.800 | 2 |
| 29B-Q-40 | 40 | 12.5 | 42.5 | 48 | 4 | 40 | 2.5 | 5.600 | 2 |
| 29B-Q-50 | 50 | 12.5 | 52.5 | 48 | 4 | 50 | 2.5 | 7.000 | 2 |
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