Polarimeter
Measures how much a solution of a chiral substance rotates the plane of polarised light. The result is used to calculate specific optical rotation, an identity and purity test for many APIs.
- Pharmaceutical
- Food & sugar
- Flavours & fragrances
- Chemicals
- Academic research
Polarimeter calibration procedures
Optical rotation (quartz plate)
Measures certified quartz control plates of known rotation and compares the readings with their certified values.
Open procedureTemperature
Compares the sample cell temperature shown by the polarimeter with a calibrated reference thermometer at the working temperatures.
Open procedureInstrument qualification (DQ · IQ · OQ · PQ)
- 01
DQ — Design qualification
Defines wavelength(s), resolution and range, temperature control at 20 °C and 25 °C, tube lengths needed and data integrity features.
- 02
IQ — Installation qualification
Checks delivery, installation, serial numbers, software version, accessories (tubes, quartz plates) and the environment.
- 03
OQ — Operational qualification
Verifies optical rotation accuracy and repeatability with certified quartz plates, and sample temperature accuracy against a calibrated probe.
- 04
PQ — Performance qualification
Shows the instrument gives correct results in routine use, for example by daily quartz plate checks or by measuring a known reference substance.
Keep every Polarimeter in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.