Polarimeter

The polarimetric method is used to analyse the structure of macro, semi-micro, and micro samples, particularly those that are valuable or irreplaceable. Its reliability is such that both the United States Pharmacopeia and the Food & Drug Administration have incorporated polarimetric standards for several substances.

Why Our Polarimeter?

• Rudolph’s Polarimeter has the Temptrol™ (Patent No. 6,717,665) Electronic Heating
  and Cooling System to eliminate the cost and space required for using an external water bath.
• Our Polarimeter has Autofill™ (Patent No. 10,101,353) to make sample loading and cleaning easier and faster. Pour the sample into the chamber, close the lid, and press start.
• All Rudolph’s Polarimeter use Glan Thompson Calcite Polarizers instead of plastic ones. Plastic polarizers are susceptible to heat, may warp over time, degrade due to moisture, and tend to absorb more light than Calcite Polarizers. As a result, they typically need to be replaced every 3 to 5 years. While Calcite Polarizer doesn’t need to be changed at all.
• Our Polarimeter uses a Tungsten Halogen lamp, which is a low-cost, very bright light source that can last 2000 hours.
• We give free accessories and consumables along with your Polarimeter purchase such as FillStation™ (Patent No. 9,677,995) to make sample loading easier.
• Rudolph offers a 20-year commitment to ensuring your instrument remains fully operational, making the long-term cost of ownership one of the lowest in the laboratory market. As of the publication date of this document, no other laboratory instrument manufacturer provides a similar guarantee of service and technical support for 20 years.
• Highly configurable. From sample loading options, to be able to combine different instruments such as the refractometer or density meter to produce measurement routines on up to 240 samples. We can design a custom configuration just for your application.
• cGMP/GLP calibration and printing
• Windows OS and versatile communication capability

How to select an Automatic Polarimeter model

• What is your application? Do you have standards like ASTM?
• What is your wavelength requirement?
• Do you need higher accuracy?
• Do you need higher temperature control?
• Do you need easy sample loading?
• Do you need 21CFR Part 11 compliance?

 

Instrument Models

We have 7 Autopol models with differences in accuracy, wavelengths, and temperature control.

Autopol I

This model is our entry-level and it is suitable for University Education, Starch Analysis, Lactose in Milk, Flavors, Chemicals, Natural Product Research, Invert Sugar, Vitamins, and Fragrance.

• Wavelength only on 589nm
•  Accuracy: 0.01° Arc
• Temperature control optional
• 21CFR Part 11 optional
• Accuracy upgrade Optional: 0.004° Arc Optical Rotation (wavelength specific)

Autopol II

The Autopol II provides the same standard and optional features as the Autopol I, but with more wavelength options. Autopol II has the same external physique like Autopol I.

• Standard Wavelengths: 589nm and 546nm
• Optional Wavelengths: 365nm, 405nm, 436nm, 578nm, 633nm
•  Accuracy: 0.01° Arc
• Temperature control optional
• 21CFR Part 11 optional
• Accuracy upgrade Optional: 0.004° Arc Optical Rotation (wavelength specific)

Autopol III

Autopol III is Rudolph’s entry-level USP pharmaceutical solution and has the same physique as Autopol I, but with better accuracy than Autopol II.

 

• Standard Wavelengths: 589nm and 546nm
• Optional Wavelengths: 436nm, 405nm, 578nm, 633nm
• Accuracy: 0.002°Arc, 0.2% above 1°
• Temperature control optional
• 21CFR Part 11 optional
• Accuracy upgrade Optional: ±0.002° up to 10° Arc, ±0.004° 10° – 89°Arc

Autopol IV

Autopol IV has 1, 2, and 6 wavelength options. It is popular for universities, pharmaceutical, and fine chemical research departments. This instrument is also beneficial for studying racemic and kinetics. 

 

• Standard Wavelengths: 365nm, 405nm, 436nm, 546nm, 589nm, 633nm
• Optional Wavelengths: 578nm
• Accuracy: 0.002° up to 1°, 0.2% up to 5°, 0.01° above 5°
• Temperature control optional
• 21CFR Part 11 optional
• Accuracy upgrade Optional: ±0.002° Arc

Autopol V

Autopol V has the same physique as Autopol IV. It has 6 wavelengths, electronic heating and cooling, and built-in 21CFR Part 11.

 

• Standard Wavelengths: 365nm, 405nm, 436nm, 546nm, 589nm, 633nm
• Optional Wavelengths: 578nm
• Accuracy: 0.002° up to 1°, 0.2% up to 5°, 0.01° above 5°
• TempTrol™ Automatic Electronic Heating & Cooling 15°-40°C ± 0.2°C 
• Built-in 21CFR Part 11 
• Accuracy upgrade Optional: ±0.002° up to 10° Arc, ±0.004° 10° – 89°Arc

Autopol V Plus

Autopol V Plus has an adjustable screen, 3 rotation quartz standards for calibration, 6 wavelengths, electronic heating and cooling, and built-in 21CFR Part 11.

 

• Standard Wavelengths: 365nm, 405nm, 436nm, 546nm, 589nm, 633nm
• Optional Wavelengths: 325nm
• Accuracy: 0.002° up to 1°, 0.2% up to 5°, 0.01° above 5°
• TempTrol™ Automatic Electronic Heating & Cooling 15°-40°C ± 0.2°C 
• Built-in 21CFR Part 11 
• Accuracy upgrade Optional: ±0.002° up to 10° Arc, ±0.004° 10° – 89°Arc

Autopol VI

Autopol VI has all the features of Autopol V Plus but with better accuracy and resolution.

 

• Standard Wavelengths: 365nm, 405nm, 436nm, 546nm, 589nm, 633nm
• Optional Wavelengths: 325nm
• Accuracy: 0.0003° Arc
• TempTrol™ Automatic Electronic Heating & Cooling 15°-40°C ± 0.2°C 
• Built-in 21CFR Part 11 

Sample Cell Types

 

You can choose sample cells on your Autopol purchase and there are 60 different sample cells to choose from but it can be divided into 9 categories:

• Ceramic Temptrol™ Cell
• Glass Cell
• Jacketed Glass Cell
• Stainless Steel Cell
• Jacketed Stainless Steel Cell
• Flowthrough Temptrol™ Cell
• Flowthrough Jacketed Stainless Steel Cell
• Small Volume Cell
• Jacketed Small Volume Cell

If you have Autopol with Temptrol™ it comes standard with the Ceramic Cell. If you don’t have Temptrol™ then you can choose other cell types. If you wish to use an external water bath for temperature control, then the Jacketed Cell is needed.

 

Flowthrough Cell is good if you want to pour the sample into the cell. While the Small Volume Cell is used if you have a small amount of sample.

 

Rudolph Glass Cell is better due to the built-in apertures, so when the light passes through the sample, it is not affected by small air bubbles along the cell wall that can reduce measurement stability.

 

Optional Accessories

Autofill™

Autofill™ (Patent No. 10,101,353)  makes sample cell loading and cleaning semi-automatic and faster. Just pour your sample into the chamber, close the lid, and press start. This option is good to eliminate contact with acids or bases even like 6 Molar HCl. Using the BubbleInspect™ technology, the Autopol fills the sample cell without bubbles. This option is available for all models.

 

Summary

First, you have to choose the models. The wavelength, accuracy, temperature control, and 21CFR Part 11 requirement can help with the selection.

If you don’t choose the Temptrol™ then you have to choose your sample cells. Glass Cell, Stainless Steel, Jacketed (for external water bath), Flowthrough, and Small Volume are available.

If you want to minimise contact with volatile samples and easier sample loading, Autofill is the answer.

Lastly, we also have some accessories and consumables if you ever need them like the quartz calibration standard, sample cells, and halogen lamp.