Azzota® Polarimeter Calibration tube

SKU: PST-N17

Polarimeter Calibration tube
Optical rotation: +17 or -17
Sugar degree: -48.51'Z
The reading is got using the sodium light (effective wave length is 589.44 nm) to perform the measurement at 20.0'C .
Calculate temperature calibration according to the formula following: At 'C =A20.0'C [1+0.000144(t-20)] Where A20.0'C is the reading of standard quartz tube at 20.0'C ; At 'C is the reading of standard quartz tube at t'C

Optical rotation 5', 35' available upon request, contact us for more info.
Q&A

1. Does a polarimeter calibration quartz tube have an expiration date?
No, quartz calibration tubes themselves do not have an expiration date. Quartz is chemically and physically stable over time. As long as the tube remains undamaged (no scratches, clouding, or contamination) and is stored properly, it should remain valid for calibration use indefinitely.

2. Is it necessary to recalibrate the tube periodically?
Not exactly. The tube itself doesn’t require recalibration, but the polarimeter instrument should be periodically calibrated using the tube to ensure accurate readings.
If your lab operates under a quality system (e.g., ISO, GMP), you may need to perform and document routine calibration checks at defined intervals (e.g., monthly, quarterly) using a certified standard solution or quartz control tube.