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【Content】 ■Proper management and usage of ultrapure water systems - Collect samples while considering the characteristics and limitations of water quality meters - Be aware of contamination when using sampling port cartridges ■Methods and know-how to prevent contamination and avoid affecting analysis - Sampling methods, container selection, container cleaning, storage of ultrapure water This book explains the precautions for using ultrapure water for analysis from the UK specialized manufacturer 'Elga LabWater,' which produces and sells compact pure water systems for laboratories, using graphs and illustrations. *If you have any questions regarding the content, please feel free to contact us. The usage of ultrapure water is crucial for high-sensitivity analysis. We also offer in-house seminars. Please feel free to reach out.

Pure water used in fields such as research and testing, clinical testing, and medical devices. Our company leverages its expertise as a pure water manufacturing equipment manufacturer to explain knowledge that is useful for efficient pure water purification suitable for each field. We have compiled an overview along with related technologies, systems, and process flow diagrams into one book. We also introduce standards appropriate for each application and the impact of specific impurities. 【Contents of the document】 ■ Water for research and testing/analysis ■ Water for clinical testing ■ Water for medical devices ■ Overview of water purification ■ Glossary *The guidebook can be viewed via "PDF Download."

Elga LabWater has become a specialized manufacturer of laboratory pure water and ultrapure water systems as a division of Veolia Water Technologies (UK) Ltd. This document includes an English version of technical materials introducing Elga's product technology and a list of application technical materials. If you are interested in any of the materials, please feel free to contact us. [Contents (partial)] ■Technology Note 1 A Solid Commitment to Quality ■Technology Note 2 PureSure System Overview ■Technology Note 3 PureSure System, how it works ■Technology Note 4 PureSure System, removal of impurities *For more details, please refer to the PDF materials or feel free to contact us.

Elga circulates tank water in most models and suppresses bacteria through UV lamps in the circulation line. There is no need to install sterilizing UV lamps in the tank, which reduces running costs. By placing pure water cartridges or filters in the circulation line, it is possible to maintain the water quality of the tank water. The quality of pure and ultra-pure water declines immediately after storage. Simply placing a sterilizing lamp in the storage tank does not ensure the maintenance of water quality. Additionally, if the water quality displayed is that of the supply water to the tank, it may differ significantly from the sampled water quality, making it unreliable for use. In this regard, pure and ultra-pure water systems with a tank water circulation system measure water quality just before sampling in the circulation line, providing peace of mind. The water quality of the tank storage stabilizes, preventing degradation, reducing the load on the ultra-pure water system, and maintaining ultra-pure water quality consistently. 【Features】 ■ No need for UV lamps for the tank ■ Prevents deterioration of tank water quality ■ Sampling water quality matches the display *For more details, please refer to the PDF document or feel free to contact us.

In Elga products, for tabletop small models with a production capacity of up to 30L/hour, a dedicated tank that can dock with the main unit is available. For floor-standing medium models with a production capacity of 60 and 120L/hour, a 50L tank is included, while large models with a production capacity of 200 to 600L/hour are equipped with a 350L tank. The integration of the device and tank achieves space-saving, easy maintenance, and reduced risk of water leakage. Medium and large models come standard with a water leak detection function. Other models can also have a water leak detector installed as an option. 【Features】 ■ Floor-standing medium models with a production capacity of 60 and 120L/hour include a 50L tank. ■ Large models with a production capacity of 200 to 600L/hour include a 350L tank. ■ Achieves space-saving, easy maintenance, and reduced risk of water leakage. ■ Medium and large models come standard with a water leak detection function. *For more details, please refer to the PDF document or feel free to contact us.

Elga products allow for the replacement of almost all consumables by simply opening the front door of the device, except for the RO membrane, which does not need to be replaced for over three years. The device design is focused on easy maintenance. In particular, the pure water and ultra-pure water cartridges can be easily replaced by anyone with a one-touch operation. Additionally, in the "PURELAB flex" and "PURELAB Chorus," the operating procedures are displayed on the screen, ensuring that replacements can be made correctly without any mistakes. Moreover, for medium-sized machines, by providing long-life cartridges (with a replacement guideline of 20,000L), the frequency of consumable replacements can be reduced, thereby lowering running costs. 【Features】 ■ Almost all consumables can be replaced by simply opening the front door of the device ■ Pursuit of easy maintenance ■ Pure water and ultra-pure water cartridges can be easily replaced with a one-touch operation ■ Reduces the frequency of consumable replacements and lowers running costs *For more details, please refer to the PDF document or feel free to contact us.

Elga's ultrapure water system does not use cartridges that cause water quality fluctuations after measuring water quality with the final water quality sensor. Furthermore, the "Chorus System" employs ultrapure water cartridges tailored to specific applications, providing ultrapure water of the highest class purity across various fields. When comparing the water quality of the sampling port of a high-sensitivity analysis ultrapure water device with and without various cartridges installed, the case without cartridges shows the smallest ghost peaks and the most stable background. 【Features】 - To suppress water quality fluctuations at the sampling port and ensure that the sampling water quality matches the monitored water quality, the final filter is placed before the water quality sensor. - The Chorus System uses ultrapure water cartridges suited to specific applications. - It supplies ultrapure water of the highest class purity across various fields. *For more details, please refer to the PDF materials or feel free to contact us.

The water quality of residual organic matter in ultrapure water can be confirmed by the amount of total organic carbon (TOC). Elga's TOC monitor measures the resistivity values before and after the UV lamp and calculates and displays the TOC value in real-time. Batch-type TOC monitors output measurement values 5 to 10 minutes after sampling, which may differ from the actual water quality at the time of sampling. Real-time monitoring measures every 2 seconds and shows a high correlation with the measurements from TOC meters, making it sufficiently reliable as a low-concentration TOC meter. **Advantages of Real-Time TOC Monitoring** - Since measurement values are displayed every 2 seconds, the displayed values are always consistent with the water quality at the time of sampling, providing peace of mind. - Sudden increases in TOC within the system can be detected before sampling ultrapure water, preventing the collection of water with insufficient purity. *For more details, please refer to the PDF document or feel free to contact us.*

Elga's pure water and ultrapure water systems are eligible for validation support across all models. Compared to supporting only the top-tier models, this allows for the selection of appropriate models, resulting in a significant reduction in initial costs. Additionally, the top-tier models have a higher number of consumables, leading to higher running costs. In this regard, Elga can propose suitable systems that match the customer's applications and usage, which also contributes to reducing running costs. 【Features】 ■ Significant reduction in initial costs due to the ability to select appropriate models ■ Proposals for suitable systems based on applications and usage ■ Contributes to reducing running costs *For more details, please refer to the PDF materials or feel free to contact us.

In this document, Elga, a specialist in the design and manufacturing of laboratory water purification systems, introduces the selection method for "pure water devices." It includes a method for selection based on daily usage amounts categorized by purpose and application (water quality). This document serves as a useful reference for selecting models. If you have any questions, please feel free to contact us. 【Main Contents】 ■ What is the purpose or application (water quality)? ■ What is the daily usage amount? ■ Selection guide for small device tanks *For more details, please refer to the PDF document or feel free to contact us.

In this document, Elga, a specialist in the design and manufacturing of laboratory water purification systems, introduces the selection method for "ultrapure water systems." It includes a method for selection based on daily usage amounts categorized by purpose and application (water quality). This document serves as a useful reference for selecting models. If you have any questions, please feel free to contact us. 【Main Contents】 ■ What is the purpose or application (water quality)? ■ What is the daily usage amount? ■ If a pure water system is available ■ Recommended pure water systems if a pure water system is not available ■ Water quality required for laboratory pure water JIS K0557 *For more details, please refer to the PDF document or feel free to contact us.

Ultra-pure water is generally defined as having a specific resistance of 18.2 MΩ·cm or higher and a TOC of less than 20 or 5 ppb. However, in the case of pure water, the quality is set according to its wide range of applications. For analytical research purposes, there is JIS K0557; for clinical testing purposes, there is CLRW; and for the cleaning of medical instruments (equipment), there are standards such as ISO 15883 and HTM 2030. You can download a more detailed explanatory document for free. [Contents] ■ Water quality required for laboratory pure water: JIS K0557 ■ Standards required for cleaning water for medical devices (endotoxin-free water) ■ Water quality required for particle-free water *For more details, please refer to the PDF document or feel free to contact us.