ASTM Type 1 Purified Laboratory Water: Production, Uses and Benefits

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AQUAANALYTIC offers a laboratory water purification system from Evoqua, a leader in the industry. Ultra Clear Laboratory Water System including multiple purification stages, reverse osmosis, UV disinfection and deionization for the production of pure laboratory water type 1, 2, 3 according to ASTM standard. Ultra Clear, Protegra, LaboStar laboratory water systems offer a wide range of models to satisfy your water purification needs.


Purified water for ASTM Type 1 laboratory use is produced through a multi-stage purification process to ensure it meets the stringent requirements outlined by the American Society for Testing and Materials (ASTM) for Type 1 water. The production process typically includes the following steps:

  • Pre-Treatment: Raw water from a suitable source, such as tap water or well water, undergoes initial pre-treatment steps. These steps may involve filtration to remove large particles and sediment, as well as the removal of chlorine and other organic contaminants.
  • Reverse Osmosis (RO): The pre-treated water is then subjected to reverse osmosis, a membrane-based separation process. RO removes a majority of dissolved salts, minerals, and other impurities, resulting in water of higher purity.
  • Deionization (DI): The water from the RO process is further processed through deionization, which involves passing it through ion exchange resins to remove remaining ions, resulting in extremely low levels of conductivity.
  • UV Treatment: Ultraviolet (UV) treatment is often used to disinfect the water and neutralize any remaining microorganisms.
  • Final Filtration: The water may undergo final filtration, which includes sub-micron filtration or other advanced techniques to remove any remaining particulate matter or contaminants.
  • Quality Control: Throughout the production process, various quality control measures are implemented to ensure that the water meets the stringent ASTM Type 1 specifications. This involves monitoring parameters such as resistivity, conductivity, total organic carbon (TOC), and microbial content.



  • Purified water of ASTM Type 1 quality is essential for various laboratory applications, especially those that require a high degree of water purity to prevent interference with sensitive analytical techniques. Some common applications include:
  • Analytical Techniques: Type 1 water is used in laboratories for the preparation of reagents, standards, and calibration solutions used in analytical techniques such as chromatography, spectroscopy, and mass spectrometry.
  • Cell Culture: For biological and cell culture applications, where any contaminants in water could affect cell viability and experimental outcomes.
  • Molecular Biology: DNA and RNA research, PCR (polymerase chain reaction), and other molecular biology techniques require ultra-pure water to prevent contamination.
  • Trace Elemental Analysis: Techniques like inductively coupled plasma mass spectrometry (ICP-MS) require water with minimal trace element content.
  • HPLC (High-Performance Liquid Chromatography): High-purity water is used in the preparation of mobile phases and sample dilution for HPLC.



Using purified water of ASTM Type 1 quality offers several advantages:

  • Accuracy and Reliability: High-purity water ensures accurate and reliable results in analytical experiments and measurements, as the water itself does not introduce contaminants.
  • Consistency: Type 1 water guarantees consistent water quality, which is crucial for maintaining reproducibility in experiments.
  • Prevention of Interference: Many analytical techniques are sensitive to impurities, so using purified water prevents interference and artifacts in results.
  • Cell and Tissue Health: In biological applications, using pure water minimizes the risk of adverse effects on cells and tissues.
  • Longevity of Equipment: Purified water reduces the likelihood of scale buildup and corrosion in lab equipment, extending their lifespan.
  • Compliance: Laboratories that adhere to ASTM Type 1 water standards can confidently meet regulatory and quality control requirements.

In summary, purified water of ASTM Type 1 quality is a critical resource in laboratories, ensuring accurate experimental outcomes, preventing contamination, and supporting a wide range of sensitive applications.

Contact AQUAANALYTIC’s engineers and we will provide in-depth advice for the right choice of water treatment equipment for your laboratory.

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