ultrapure water Articles

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Electrodeionization - Ultrapure water

by SIMPEC S.r.l.  (Sep. 29, 2011)

Continuous Electrodeionization Process The continuous electrodeionization process (CEDI),  is a system that uses ion exchange resins and electricity  for the production of ultrapure deionized water without chemical processes and without production stops. SIMPEC uses modular systems for the electrodeionization processes. The CEDI ...

UltraPure water: systems for microelectronics

by 3M Membrane Filtration (formerly Membrana)  (Jun. 1, 2006)

The burgeoning electronics industry Electronics are the heartbeat of the products and services of many industries – including aerospace, communications, entertainment, defence, and health – and, as a consequence, the global electronics market is valued at US$1 trillion worldwide. ...

Ultrapure Water: World Markets Report

by The McIlvaine Company  (Jun. 8, 2010)

Provides continually updated analyses and forecasts of ultrapure water systems and a number of specific components and consumables such as resins for power, pharmaceutical, semiconductor, and other industries. Click here for ...

Ultrapure water – The standard for resistivity measurements of Ultrapure water case study

by SnowPure Water Technologies  (Mar. 2, 1998)

Abstract For years, resistivity/conductivity2 instrumentation has been used as a reliable indicator of ionic water quality, especially for ultrapure water (UPW). Traditionally, the instrumentation is procured, installed, powered up, and perhaps connected to a PLC, strip chart recorder, or a LAN. After that, the instrument and sensor receive no ...

A Case for Point-of-Use RO Ultrapure Water Systems

by GE Water & Process Technologies  (Jan. 1, 2000)

ULTRAPURE WATER CRITERIA - AN OVERVIEW 'Pure water' is a relative term. Practically speaking, no water, naturally occurring or treated by man, consists solely of H2O molecules. Forever in pursuit of achieving equilibrium with its surroundings, water has unique characteristics that result in its ability to dissolve most matter. This property of ...

Analysis of impurities in ultrapure water by dynamic reaction cell ICP-MS

by PerkinElmer, Inc.  (Oct. 28, 2009)

Ultrapure Water (UPW) is used for the cleaning of instruments and containers in trace analysis and for dilution of samples. The analysis of impurities in UPW requires increasingly lower levels of detection and higher instrument productivity. SEMI Standard F63-03091 specifies a maximum contamination for metals of 0.02-0.1 ppb for each element for ...

Water, Wastewater, and Filtration: World Markets Report

by The McIlvaine Company  (Jun. 8, 2010)

Forecasts of the $183 billion market for water and wastewater treatment and filtration products and services including outsourcing. Also included are world forecasts for chemicals, cartridges, macro filtration, membranes, sedimentation, centrifugation, and ultrapure water ...

The fundamental conductivity and resistivity of water

by SnowPure Water Technologies  (Jan. 1, 2005)

Pure water has a very low. but not quite zero, electrical conductivity. This conductivity provides a probe into fundamental properties of water, including the electrochemical mobility of the hydrogen and hydroxide ions. Deviation from this value is a measure of trace ionic impurities. Ultrapure water (UPW). with impurities at or below the ...

Methods of Water Purification

by GE Water & Process Technologies  (Jan. 1, 1992)

This article is excerpted from 'Pure Water Handbook' published by Osmonics®, Inc. of Minnetonka, Minnesota USA and is printed with permission of Osmonics, Inc. Water treatment can be defined as any procedure or method used to alter the chemical composition or natural 'behavior' of a water supply. Water supplies are classified as either surface ...

Add polish to high purity water

by Agape Water Solutions, Inc.  (Jul. 1, 2010)

Electrodeionization (EDI) has recently gained widespread acceptance by water treatment companies and end users alike for almost all applications requiring high-purity water. EDI has proven to be a reliable, cost-effective solution for both end users and water treatment companies. End users purchasing capital equipment can eliminate on-site ...

Detecting Mercury in Water

by Arizona Instrument LLC  (Aug. 11, 2015)

Determination of Mercury (Hg) in Water by Hand-Held, Portable Cold Vapor Atomic Fluorescence SpectrometryWater is the most familiar and most abundant compound on Earth, making up 71% of its surface area.[1]It is a vital component for all known forms of life and is the aquatic habitat for thousands of species of microalgae, fish and shellfish. [2] ...

Meeting water quality specifications for 300 mm processing

by 3M Membrane Filtration (formerly Membrana)  (Mar. 28, 2001)

Abstract This paper reviews the historical ultrapure water specifications and compares them to the specifications for state of the art ...

River water is filtered for use in an electronic disk manufacturing facility in Hokkaido, Japan

by New Logic Research, Inc.  (May 31, 2007)

New Logic International installed its Vibratory Shear Enhanced Processing (VSEP) Phase I system in July, 1997, and the Phase II system in August 1998 at a major international electronic disk manufacturing facility at Hokkaido Island located in Northern Japan. The VSEP is used for treatment of river water for ultrapure water production at this ...

VSEP treats well and surface water to provide ultra clean drinking water

by New Logic Research, Inc.  (May 31, 2007)

New Logic Research manufactures a proprietary vibrating membrane filtration system that is uniquely suited for treatment of commercial and domestic drinking water. The use of a vibrating membrane mechanism to avoid membrane fouling is new and is just the kind of improvement needed to make the use of membrane filtration an effective and economical ...

Water matrix effect on UV photodegradation of perfluorooctanoic acid

by IWA Publishing  (Jan. 1, 2011)

The widespread detection of perfluorinated compounds (PFCs) in the water environment has been a concern for the last several years, while effluents from wastewater treatment facilities are the major sources of these compounds. Even advanced oxidation technologies (AOTs) are not useful for mineralization of the compounds due to their very high ...

Removal of bromide and bromate from drinking water using granular activated carbon

by IWA Publishing  (Feb. 27, 2015)

Granular activated carbon (GAC) was used to remove bromide (Br−) and bromate (BrO3−) from drinking water in both bench- and pilot-scale experiments. The present study aims to minimize BrO3− formation and eliminate BrO3− generated during the ozonation of drinking water, particularly in packaged drinking ...

Application of Membrane Technology for the Recovery and Reuse of Water

Abstract As water and sewer costs are expected to increase over the next decade, membrane technology will continue to be a viable and economical option in the recovery and reuse of water. This paper describes the mechanism of membrane effected separation (specifically reverse osmosis, ultrafiltration and microfiltration), membranes commercially ...

Crossflow Membrane Filtration High-Purity Water Systems

by GE Water & Process Technologies  (Apr. 1, 1991)

INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This ...

AU optronics uses aqueduct maps to assess water risk

by World Resources Institute WRI  (Aug. 27, 2012)

This post is part of a series on World Water Week, an annual event designed to draw attention to and discuss global water issues. Read more posts in this series. This piece was co-authored by Keith Liao, Senior Engineer with the AU Optronics Corporate ...

Conductivity Measurement in high purity water samples below 10 microsiems/cm

by IC Controls Ltd.  (Jan. 1, 2012)

High Purity Water Resistivity/ Conductivity Measurement Ultra-Pure Water without any chemical impurities will still have a conductivity because of the presence of H* and OH" ions due to the self-ionization of water. Ultra-pure water has a conductivity of 0.055 HSiemens'cm or a resistivity of 18.18 mQ-cm at 25 °C. In order to know the ...

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