منابع مشابه
Ultrapure water blank for boron trace analysis
Weakly charged elements, or elements that are not well dissociated in water, are not removed ef®ciently by conventional water-puri®cation technologies. In the production of high-purity water, silica and boron are generally the ®rst ions to breakthrough into puri®ed water when the ion-exchange resin approaches depletion. In this study, the behavior of these two elements was studied through vario...
متن کاملAnalysis of bacteria contaminating ultrapure water in industrial systems.
Bacterial populations inhabiting ultrapure water (UPW) systems were investigated. The analyzed UPW systems included pilot scale, bench scale, and full size UPW plants employed in the semiconductor and other industries. Bacteria present in the polishing loop of the UPW systems were enumerated by both plate counts and epifluorescence microscopy. Assessment of bacterial presence in UPW by epifluor...
متن کاملUltratrace measurement of calcium in ultrapure water using the Agilent 8800 Triple Quadrupole ICP-MS
In the semiconductor industry, the control of metal impurities in the process chemicals used in the manufacture of semiconductor devices is critical to achieve the required product performance and yield. As device performance is continually increasing, the required impurity control becomes ever more stringent. For example, metal content of the ultra pure water (UPW) used in the manufacturing pr...
متن کاملUltrapure dialysis water obtained with additional ultrafilter may reduce inflammation in patients on hemodialysis
BACKGROUND Patients on standard dialysis, in particular those on high-flux and high-efficiency dialysis, are exposed to hundreds of liters of dialysis-water per week. The quality of dialysis-water is a factor responsible for inflammation in dialysis patients. Inflammation is a potent trigger of atherosclerosis and a pathogenetic factor in anemia, increasing mortality and morbidity in dialysis p...
متن کاملTreatment of Leptothrix Cells with Ultrapure Water Poses a Threat to Their Viability
The genus Leptothrix, a type of Fe/Mn-oxidizing bacteria, is characterized by its formation of an extracellular and microtubular sheath. Although almost all sheaths harvested from natural aquatic environments are hollow, a few chained bacterial cells are occasionally seen within some sheaths of young stage. We previously reported that sheaths of Leptothrix sp. strain OUMS1 cultured in artificia...
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ژورنال
عنوان ژورنال: Hyomen Kagaku
سال: 2014
ISSN: 0388-5321,1881-4743
DOI: 10.1380/jsssj.35.504