Quartz sub-boiling distillation system

subPUR and duoPUR


Quartz sub-boiling distillation system

Milestone has developed the duoPUR and subPUR, sub-boiling distillation systems which allow laboratories to make their own high purity acids at dramatically reduced costs.

Make your own ultrapure acids

The chemical reagents used during the analysis are an important source of the analytical blank. Sub-boiling distillation has been demonstrated to be the best method of acid purification. Offering an optimal purification method for preparation of high purity reagents, this type of acid distillation uses contactless infrared lamps to vaporize the surface liquid at a temperature typically 20°C below the boiling point.
In contrast to conventional distillation systems, where strong boiling action generating aerosolized particles results in contamination of the original liquid with the distillate, the duoPUR acid purification system using sub-boiling technology provides gentle surface evaporation preventing the formation of spray or droplets and yields to ultrapure acids.
The duoPUR offers an alternative to the purchase of expensive high purity acids for trace elemental analyses.

  • Up to 90% cost saving of ultrapure acids

  • High productivity, up to 400 mL per hour with duoPUR

  • ‘On-demand’ acid purification

  • Re-purification of contaminated acids

  • Single or double distillation upon on requirements

Product Specialist

Mikael Alfredsson

"Our expert in Digestion, Extraction, Syntesis and Evaporation with more than 20 years experience in the field of sales and service. Contact me for if you have questions or need a quotation"

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031-709 8186

“In the preparation of high purity reagents,
there is only one significant and practical choice
for the method of purification: sub-boiling distillation"
US EPA SW-846, Chapter 3, Update IVB.

Why sub-boiling technology?

 

The chemical reagents used during the analysis are an important source of the analytical blank. Sub-boiling distillation has been demonstrated to be the best method of acid purification. It uses contactless infrared lamps to vaporize the surface liquid at a temperature typically 20°C below the boiling point. In contrast to conventional distillation, where strong boiling action generating aerosolized particles results in contamination of the original liquid with the distillate, a gentle surface evaporation during sub-boiling distillation prevents the formation of spray or droplets and yields to a very high pure acid.

duoPUR Quartz sub-boiling system

The duoPUR consists of two quartz distillation units. Each unit contains two infrared heating elements (1), a water cooled condenser (2), a high-purity PFA collection bottle (3), and a fully automatic acid loading/discharge system. The vaporized liquid is collected on the inclined water-cooled condenser and drips into the collection bottle. The distillation process is microprocessor controlled, allowing the user to set the distillation time and power level by using a compact control terminal with easy-to-read, bright, full-color, touch-screen display. The distillation rate ranges from 50 to 400 mL per hour, depending on the power setting and the temperature of the cooling water.

Compare Sub-boiling and traditional distilaltion

Do you know how to reduce the sample prep blank?

Read our book! It explains how a laboratory can reach full control of analytical blanks and sample preparation for obtaining accurate results. The application of instruments and strategies to control sample prep blank is often called a “Clean Chemistry” technique. This book discusses the factors impacting blank quality, in particular when microwave digestion is used, and reviews some Clean Chemistry products and technologies designed to help the analyst generate superior analytical data on their ICP-OES or ICP-MS instrumentation.

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How Much Will Sub-Boiling Distillation Save You Each Month?

Calculate ROI with our Worksheet

PTFE sub-boiling distillation system

subCLEAN


PTFE sub-boiling distillation system

The Milestone subCLEAN is a compact and easy-to-use sub-boiling system suitable for the purification of HF, as well as for HNO3 and HCl.

Brochure

Make your own HF, HNO3 and HCl acids

The chemical reagents used during the analysis are an important source of the analytical blank. Sub-boiling distillation systems has been demonstrated to be the the leading method of acid purification.
In contrast to acid purification through conventional distillation, where strong boiling action generating aerosolized particles results in contamination of the original liquid with the distillate, acid distillation system using sub-boiling technology prevents the formation of spray or droplets and yields to a very high pure acid.
The Milestone subCLEAN is a compact and easy-to-use sub-boiling system, where all parts in contact with acids are made of high-purity fluoropolymers. Offering an optimal purification method for preparation of high purity reagents, our subCLEAN system is therefore suitable for HF, as well as for HNO3 and hydrochloric acid purification.

  • ● Up to 90% cost saving of ultrapure acids

  • ● High productivity

  • ● ‘On-demand’ acid purification

  • ● Re-purification of contaminated acids

Product Specialist

Mikael Alfredsson

"Our expert in Digestion, Extraction, Syntesis and Evaporation with more than 20 years experience in the field of sales and service. Contact me for if you have questions or need a quotation"

This email address is being protected from spambots. You need JavaScript enabled to view it.
031-709 8186

“In the preparation of high purity reagents, there is only one significant and practical choice for the method of purification: sub-boiling distillation"
US EPA SW-846, Chapter 3, Update IVB.

Why sub-boiling technology?

With subCLEAN system, the acid is automatically loaded into the distillation container, where it is gently heated below its boiling temperature. All process is microprocessor controlled by using a compact control terminal with easy-to-read, bright, full-color, touch-screen display.
The subCLEAN does not require cooling water or a chiller, as acid vapors rapidly condense into a collection bottle

Compare Sub-boiling and traditional distillation

Compare acid steam cleaning to acid leaching

The container to be cleaned is placed over a PTFE coated glass rod. Acid in the lower reservoir is heated, and purified acid vapor travels up through the glass rod and condenses on the container, removing surface contamination. This method of cleaning is a preferred alternative to the soaking preconditioning methods for the following reasons:


1, The trace metal contamination found in the reagent grade acid remains in the lower reservoir and does not come in contact with the component to be cleaned.
2. The clean component does not remain in contact with the cleaning acid after the surface contamination is removed.
3. The critical surfaces of the clean component are dry when the cleaning process is complete. This eliminates the need for rinsing and air drying.
4. The cleaning process takes place in a sealed container which minimizes airborne contamination and provides a clean environment for the components to be stored until they are needed.

Compare techniques

How Much Will Sub-Boiling Distillation Save You Each Month? by forced air cooling.

Calculate ROI with our worksheet

Do you know how to reduce the sample prep blank?

Read our book! It explains how a laboratory can reach full control of analytical blanks and sample preparation for obtaining accurate results. The application of instruments and strategies to control sample prep blank is often called a “Clean Chemistry” technique. This book discusses the factors impacting blank quality, in particular when microwave digestion is used, and reviews some Clean Chemistry products and technologies designed to help the analyst generate superior analytical data on their ICP-OES or ICP-MS instrumentation.

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Acid steam cleaning system

traceCLEAN


Acid steam cleaning system

traceCLEAN assures best cleaning quality of your TFM, glass and quartz parts for ICP/ICP-MS accessories. Any trace metal contaminants that are present in the cleaning acid stay within the reservoir and do not come in contact with the cleaned trace accessories.

Brochure

Full contamination control from containers

Cleaning various items used in ultra-trace analysis work is a critically important laboratory routine. To minimize contamination, traditional cleaning methods require soaking items in hot acids, often for several hours. To be effective large volumes of acid are consumed and need to be changes regularly. There is also a substantial risk of exposure to hot acids and acid vapors using traditional soaking techniques. To address these issues, Milestone has developed the traceCLEAN, a fully automated, self-contained, acid steam cleaning system for trace metal analysis accessories.

  • Versatile

    Best cleaning quality of lab apparatus, either TFM, glass and quartz parts

  • Safe and Easy-to-use

    No operator exposure to acid vapors.

  • Highly Productive

    Fast, convenient, clean, and fully automated.

  • Cost-effective and productive

    No changing of acids or soaking required.

Product Specialist

Mikael Alfredsson

"Our expert in Digestion, Extraction, Syntesis and Evaporation with more than 20 years experience in the field of sales and service. Contact me for if you have questions or need a quotation"

This email address is being protected from spambots. You need JavaScript enabled to view it.
031-709 8186

“In trace analysis the effects of contamination from laboratory air or furnishings, apparatus, containers, and reagents have become increasingly important, as the sensitivity of analytical methods has lowered detectable limits to the nanogram and picogram level”.
M. Zief, J. W. Mitchell, Contamination Control in Analytical Chemistry

How it works

Steam cleaning with nitric or hydrochloric acid vapors is a very effective cleaning method for preconditioning and routine cleaning of containers and apparatus. The container to be cleaned is placed over a PTFE coated glass rod. Acid in the lower reservoir is heated, and purified acid vapor travels up through the glass rod and condenses on the container, removing surface contamination.

Compare acid steam cleaning to acid leaching

The container to be cleaned is placed over a PTFE coated glass rod. Acid in the lower reservoir is heated, and purified acid vapor travels up through the glass rod and condenses on the container, removing surface contamination. This method of cleaning is a preferred alternative to the soaking preconditioning methods for the following reasons:


1, The trace metal contamination found in the reagent grade acid remains in the lower reservoir and does not come in contact with the component to be cleaned.
2. The clean component does not remain in contact with the cleaning acid after the surface contamination is removed.
3. The critical surfaces of the clean component are dry when the cleaning process is complete. This eliminates the need for rinsing and air drying.
4. The cleaning process takes place in a sealed container which minimizes airborne contamination and provides a clean environment for the components to be stored until they are needed.

Compare techniques

Do you know how to reduce the sample prep blank?

Read our book! It explains how a laboratory can reach full control of analytical blanks and sample preparation for obtaining accurate results. The application of instruments and strategies to control sample prep blank is often called a “Clean Chemistry” technique. This book discusses the factors impacting blank quality, in particular when microwave digestion is used, and reviews some Clean Chemistry products and technologies designed to help the analyst generate superior analytical data on their ICP-OES or ICP-MS instrumentation.

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Ultratrace Inserts for low blank levels

Vessel-Inside-Vessel Technology


Ultratrace Inserts for low blank levels

Setting new standards in vessel inside vessel technology  
We introduce the best of vessel-inside-vessel solutions to ensure lower analytical blank during microwave digestion in modern laboratory. This configuration reduces the amount of acid required for digestion to near stoichiometric quantities which provides lower dilution factor to increase detection limit

Brochure

Increase detection limit with lower dilution factor

Microwave digestion techniques typically require a minimum volume of reagents of about 5 mL to achieve accurate temperature monitoring of the reaction conditions and for low blank levels. However sometimes it is important to maintain an even lower dilution factor when working at concentrations near the method detection limit. These factors inspired us to use vessel-inside-vessel technology. It uses smaller secondary vessel (2) inside the primary microwave vessel (1). The secondary vessel contains sample and digestion reagents (3), while the primary vessel contains the solution in which temperature control takes place.
This setup reduces the amount of acid required for digestion, lowering dilution factor and increasing detection limit.
A variety of vessel inserts is available from Milestone in different materials (Quartz or TFM) provided in different sizes and shapes, to satisfy all application requirements.

  • ● Less acid volume

  • ● Higher sample amount

  • ● Lower dilution factor

  • ● Increased method detection limit

  • ● Less surface contamination

  • ● Lower analytical blank

Product Specialist

Mikael Alfredsson

"Our expert in Digestion, Extraction, Syntesis and Evaporation with more than 20 years experience in the field of sales and service. Contact me for if you have questions or need a quotation"

This email address is being protected from spambots. You need JavaScript enabled to view it.
031-709 8186

“To keep blank levels as low as possible the analyst must exercise care in keeping the volume of reagents to a minimum”.
T. Murphy, The role of analytical blank in accurate trace analysis.

Why maintaining a very low dilution factor

Analytical chemists are being required to measure lower and lower levels of trace metals in samples. This frequently requires the analyst to make measurements near the method detection limit which usually result in decreased accuracy and precision. Closed-vessel microwave digestion techniques require a minimum volume of 10 mL to achieve accurate temperature monitoring of the reaction conditions. Ideally, modern spectroscopic techniques require samples submitted for analysis to have acid concentration of 1 to 5% v/v. This requires samples that were digested with 10 mL of acid to be diluted by a factor of 500 to achieve the 1 to 2% acid content necessary for ICP analysis. These large dilution factors often result in some of the analytes becoming non-detectable.
These large dilutions are often overcome by maximizing the sample size relative to the amount of digestion acid. This approach works well for samples that do not contain a large amount of organic material. For samples with high organic content this is usually not an option because the reaction gases (CO2 and NOx) produced during the digestion can cause the microwave vessel to vent when larger sample sizes (greater than 0.5 grams) are used. Recent advances in understanding of microwave-assisted sample preparation have led to the development of vessel inside vessel technology as a means to improving method detection limits for high organic samples.
The Vessel inside vessel technology provides better reaction control. Controlling reaction kinetics is especially important when trying to digest large quantities (0.5 to 1.0 g) of organic material because the potential for auto-catalytic decomposition increases. Moreover, it helps control these self-sustaining auto-catalytic reactions by providing a heat sink for the energy liberated during oxidization.

No cross contamintion

Three blanks were analyzed in run #1. The same blank was prepared along with two Animal Tissue samples, showing no cross contamination.

Blank 2 mL HNO3. Analysis by ICP-AES

Sample weight 100 mg. Blank 2 mL HNO3. Analysis by ICP-AES


Complete Recovery

Polyethylene EC680K Sample weight 200 mg. Blank 2 mL HNO3. Analysis by ICP-AES

Human Hair IAEA 085 Sample weight 100 mg. Blank 2 mL HNO3. Analysis by ICP-AES

Do you know how to reduce the sample prep blank?

Read our book! It explains how a laboratory can reach full control of analytical blanks and sample preparation for obtaining accurate results. The application of instruments and strategies to control sample prep blank is often called a “Clean Chemistry” technique. This book discusses the factors impacting blank quality, in particular when microwave digestion is used, and reviews some Clean Chemistry products and technologies designed to help the analyst generate superior analytical data on their ICP-OES or ICP-MS instrumentation.

This email address is being protected from spambots. You need JavaScript enabled to view it.

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Genetec is a member of the same family of companies as Kovalent. Both companies share the same set of values and are in many ways integrated with each other. The main difference between the two companies are their products. Kovalent is involved in system solutions including instrumentation and Genetec is mainly working with consumables. The focus of Genetec is chromatography accessories. You are welcome to visit their state of the art web shop: genetec.se