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Ultrapure Acid Production and Acid Cleaning

Sub-boiling acid purification and reflux cleaning for ultra-trace blanks.

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duoPUR sub-boiling acid purification system

Inorganic Sample Preparation · 4 models

Trace analysis is limited by the blank, and the blank usually comes back to the acid and the vessel. Sub-boiling distillation addresses both. Acid is heated below its boiling point, so only the surface evaporates; the vapor condenses and is collected as high-purity acid while the involatile impurities stay in the source liquid. Because the acid never boils, droplets and the impurities they carry are not swept over. The same principle, run in reverse, cleans vessels: hot ultrapure acid vapor refluxes through them and leaves a ppt-level blank.

3000 mL output

duoPUR delivers 3000 mL of high-purity acid in eight hours, equivalent to six conventional purifiers.

ppt-level blanks

TraceCLEAN refluxes hot ultrapure acid vapor through vessels to ppt-level blank values.

One-hour cleaning

A TraceCLEAN batch finishes within an hour, so vessels return to use the same day.

Contaminated acid recovered

subCLEAN can repurify acid that has already been contaminated, extending reagent use.

Models

Choose the configuration.

Four systems cover the workflow. TraceCLEAN cleans TFM, PFA and quartz ware in cycles of an hour or less. duoPUR, subCLEAN and SD2000 produce acid at different rates and in different materials: 3000 mL in eight hours from a quartz tube, 900 mL in twelve hours from PFA, or 800 mL in twelve hours from PFA with timed programming. Capacity, tube material and control, rather than the distillation chemistry, separate them.

TraceCLEAN

Automated acid reflux cleaning system

TraceCLEAN cleans the TFM, PFA and quartz vessels used in elemental analysis with hot ultrapure acid vapor. Digestion tubes are refluxed continuously during the cycle and reach ppt-level blank values, which controls blank contamination before ultra-trace work. Acid addition, waste draining, tray sealing and vessel handling are automated, and a batch takes an hour or less.

Cleans TFM, PFA and quartz vessels used in elemental analysis
Ultra-trace, fully automated cleaning process
Batch cleaning in one hour or less, ready for immediate use
Hot ultrapure acid vapor refluxes through each vessel continuously
Cleaned vessels reach ppt-level blank values
Automatic acid addition and waste draining
Built-in exhaust and cooling accelerate condensation and reflux

Batch cleaning time	1 hour or less
Vessel blank	ppt level

duoPUR

Sub-boiling distillation system for ultrapure acid

duoPUR produces ultrapure acid by sub-boiling distillation, heating the surface of the liquid with non-contact infrared radiation and condensing the vapor in a water-cooled collector. The high-purity quartz purification tube protects the distillate, and throughput reaches 3000 mL in eight hours, equivalent to six conventional acid purifiers. Acid filling and draining are automatic, and the touchscreen stores several purification programs.

Sub-boiling distillation below the acid boiling point
Non-contact infrared heating of the liquid surface
High-efficiency water cooling for rapid condensation
3000 mL of high-purity acid in 8 hours
Output equivalent to six conventional acid purifiers
High-purity quartz purification tube
Automatic acid filling and draining, with stored touchscreen programs

Output	3000 mL / 8 h
Purification tube	High-purity quartz

subCLEAN

Sub-boiling distillation system for ultrapure acid

subCLEAN applies the same sub-boiling principle and non-contact infrared heating in a smaller, PFA-tube format. It produces 900 mL of high-purity acid in twelve hours and can also repurify acid that has already been contaminated, which suits laboratories that generate and reuse acid. A thermal protection switch guards against overheating and dry boiling.

Sub-boiling distillation with non-contact infrared heating
900 mL of high-purity acid per 12 hours
PFA purification tube
Can repurify contaminated acid
Thermal protection switch prevents overheating and dry boiling
Automatic acid filling and draining
Color touchscreen with multiple stored purification programs

Output	900 mL / 12 h
Purification tube	PFA

SD2000

Sub-boiling distillation system for ultrapure acid

SD2000 is a sub-boiling still with wrap-around heating and a PFA purification tube. It produces 800 mL of high-purity acid in twelve hours, with a timed distillation program and a temperature range from room temperature to 200 °C adjustable in 0.1 °C steps. It suits laboratories that need a steady small volume of ultrapure acid rather than the highest throughput.

Sub-boiling distillation with wrap-around heating
800 mL of high-purity acid per 12 hours
PFA purification tube
Programmed timed distillation
Temperature adjustable from room temperature to 200 °C
Control accuracy of 0.1 °C

Output	800 mL / 12 h
Temperature range	Room temperature to 200 °C
Control accuracy	0.1 °C
Purification tube	PFA

Full specifications for other configurations, voltages and options are available on request.

The range

Configurations and accessories.

subCLEAN sub-boiling acid purification system

SD2000 ultrapure acid preparation system

Applications

Where this range is used.

Ultrapure acid for trace-element analysis, calibration and blank control
Cleaning digestion tubes to ppt-level blanks before ultra-trace analysis
Repurification of contaminated or spent acid
Quartz, PFA and TFM ware cleaning in ultra-clean laboratories
Trace-element sample preparation in geological and environmental laboratories

Pharmaceutical & Biopharma → · Semiconductor & High-Purity Materials →

Questions

Before you buy.

How does sub-boiling distillation purify acid?

The acid is heated below its boiling point by non-contact infrared radiation, so only the liquid surface evaporates. The vapor is condensed and collected, while involatile impurities remain in the source acid. duoPUR, subCLEAN and SD2000 all use this principle and differ in output, tube material and control.

Which acid purification system fits a high-throughput laboratory?

duoPUR produces 3000 mL in eight hours, about six times a conventional purifier, and uses a high-purity quartz tube. subCLEAN produces 900 mL in twelve hours and can repurify contaminated acid. SD2000 produces 800 mL in twelve hours with timed programming and 0.1 °C temperature control.

How do I keep digestion vessels free of trace contamination?

TraceCLEAN cleans TFM, PFA and quartz vessels automatically with hot ultrapure acid vapor. Each batch takes an hour or less, and cleaned tubes reach ppt-level blanks, so vessels can be cleaned and used the same day without manual acid handling.