Laboratory Standard Type I Ultrapure Water Preparation: Removal of Organic Carbon

Unlike inorganic ions, which can be efficiently removed using traditional ion exchange methods, dissolved organic compounds (such as humic acid, alcohols, surfactant residues, trace drug components, etc.) in water are complex in structure and vary in molecular weight, making them difficult to treat with conventional methods. Their presence can lead to multiple hazards:

To tackle the stringent challenge of TOC removal, Youshui Electromechanical's solution does not rely on a single technology but instead builds a synergistic "defense chain" to ensure that the TOC level in the ultrapure water remains consistently below 5 ppb (or even lower), meeting the type I ultrapure water standard:

Controlling Organic Carbon Input from the Source Youshui's ultrapure water system utilizes optimized multi-media filtration and activated carbon adsorption as the core pre-treatment. The carefully selected high-efficiency activated carbon, with its developed microporous structure and large surface area, can strongly adsorb most large organic molecules, residual chlorine, and oxidants in the water, clearing obstacles for subsequent refinement.

Youshui's high-efficiency RO membrane components serve as a physical barrier, effectively intercepting more than 99% of dissolved salts and organic compounds with a molecular weight greater than 100 Daltons. The precise selection of membranes and the meticulous control of system parameters are fundamental to ensuring low TOC in RO-treated water.

While removing residual inorganic ions, some charged organic ions or polar organic molecules may also be adsorbed by the charged ion-exchange resins. Youshui's EDI module is well-designed, combined with high-purity mixed-bed resins (nuclear-grade or electronic-grade) to provide dual protection by further removing salt and charged organic compounds.

This is Youshui's "secret weapon" for tackling trace TOC. High-energy ultraviolet light can directly split water molecules to generate highly oxidative hydroxyl free radicals. These free radicals can indiscriminately oxidize the residual organic carbon molecules in the water, breaking them down into carbon dioxide and water, thus reducing TOC to an extremely low level. Youshui's UV system design emphasizes the optimal match of light intensity, flow rate, and reaction time to ensure maximum oxidation efficiency.

The final stage employs 0.22μm or smaller pore size ultrafiltration membranes to thoroughly intercept any bacteria, endotoxins, and particles that might proliferate, ensuring the water is pure and sterile to meet the strictest sterile experimental requirements.

Hefei Youshui Electromechanical Equipment Co., Ltd. has been deeply involved in thetype I ultrapure water equipment field for many years, and its equipment's outstanding performance in TOC removal stems from the following core advantages:

In today's pursuit of precision in scientific exploration and advanced manufacturing, the organic carbon content in ultrapure water has become a key criterion for measuring water quality. Hefei Youshui Electromechanical Equipment Co., Ltd. has successfully solved the TOC removal challenge by building a scientific, rigorous, and efficient multi-stage treatment barrier. This solution continuously provides ultrapure water that meets or even exceeds type I water standards for medical institutions, laboratory networks, testing and certification agencies, and cutting-edge industrial sectors. This not only ensures the reliability of experimental data and extends the lifespan of precision instruments but also lays a pure foundation for scientific discoveries and technological advancements. Choosing Youshui is choosing the highest commitment to experimental accuracy and product quality.