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Gross alpha activity

More than 99% of the Sr and Cs together with 90% of gross alpha-activity could be extracted in the presence of 8 M Na+ and subsequently re-extracted into acidic... [Pg.250]

Guideline values recommended Gross alpha activity Gross beta activity... [Pg.73]

Gross alpha activity 15 picoCuries L 1 Radium 226/228 5 picoCuries L ... [Pg.481]

Discharge of dewatering effluents from underground uranium mines and runoff from uranium mine tailings piles have contaminated surface waters and aquifers in New Mexico with elevated levels of gross alpha activity and uranium (NMHED 1989). The concentration of uranium in mine discharge water in New Mexico was 31,500 pg/L (equivalent to 22,680 pCi/L assuming the uranium content is natural uranium)... [Pg.296]

This paper describes the analytical characteristics of four Dutch norms, dealing with the determination of gross alpha and gross beta activity in solids, filters and water [7]. A gross alpha activity is reported as an Am-equivalent and a gross beta activity as a equivalent (of course in the case where Am and are calibration nuclides). [Pg.43]

NEN 5622 2006 - Radioactivity measurements - Determination of massic gross-alpha activity of a solid counting sample by the thick source method. NEN, Delft, The Netherlands (in Dutch). [Pg.43]

Water quality Measurement of gross alpha activity in nonsaline water (Thick source method)... [Pg.418]

Alpha particles (gross alpha activity) Certain minerals are radioactive and may emit a form of radiation called alpha radiation RW 0.1 Bqr 15pCil Evaporation, co-precipitation... [Pg.5004]

Radioactivity in environmental waters can originate from both natural and artificial sources. The natural or background radioactivity usuaUy amounts to <100 mBq/L. The development of the nuclear power industry as weU as other industrial and medical uses of radioisotopes (qv) necessitates the deterrnination of gross alpha and beta activity of some water samples. These measurements are relatively inexpensive and are useful for screening samples. The gross alpha or beta activity of an acidified sample is deterrnined after an appropriate volume is evaporated to near dryness, transferred to a flat sample-mounting dish, and evaporated to dryness in an oven at 103—105°C. The amount of original sample taken depends on the amount of residue needed to provide measurable alpha or beta activity. [Pg.233]

Gross alpha and gross beta activity can be determined by various radioactive counters, such as internal proportional, alpha scintillation, and Geiger counters. Radium in water can be measured by co-precipitating with barium sulfate followed by counting alpha particles. Radium-226 can be measured from alpha counting of radon-222. Various methods are well documented (APHA, AWWA, and WEF 1998. Standard Methods for the Examination of Water and Wastewater, 20 ed. Washington DC American Public Health Association). [Pg.786]

Radium-226, radium-228 Gross alpha particle activity (excluding radon and uranium)... [Pg.74]

Whittaker EL. 1986. Test procedure for gross alpha particle activity in drinking water Interlaboratory collarobrative study. Las Vegas, NV U.S. Environmental Protection Agency, Environmental Systems Laboratory, EPA/600/S4-86/027. [Pg.91]

A. Gross alpha particle activity, Radium-226 and Radium-288... [Pg.491]

Several methods that do not require chemical separation are available for measuring uranium in urine (in units of total mass or total activity). These methods include spectrophotometric (total mass), fluorometric (total mass), kinetic phosphorescence analysis (KPA) (total mass), and gross alpha (total activity) analyses (Wessman 1984). The most widely used methods for routine uranium analysis are a-spectrometry and liquid scintillation spectrometry. These methods utilize the natural radioactivity of uranium and are sensitive and require little sample preparation. Photometric techniques such as fluorometry and phosphorometry are less widely used, but kinetic phosphorescence analysis is becoming more widely used. Measurements of total uranium do not provide the relative isotopic abundance of the uranium isotopes, but this may only be important when converting between activity and mass when the isotopic ratios are uncertain. [Pg.316]

THE DETERMINATION OF GROSS ALPHA AND GROSS BETA ACTIVITY IN SOLIDS, FILTERS AND WATER - VALIDATION OF DUTCH PRE-NORMS... [Pg.38]

The Determination of Gross Alpha and Gross Beta Activity in Solids, Filters and Water 39 2.2. NVN 5622 - gross alpha in solids... [Pg.39]

The gross-alpha and gross-beta activities were measured separately with a gas flow counter there were no alpha-to-beta spill-over issues. [Pg.40]

In the NVN 5636 intercomparison, six laboratories analyzed glass-fibre filters and membrane-filters for gross alpha and gross beta activity (see table 3 and table 4). The result for one laboratory was rejected as an outlier. [Pg.41]

See other pages where Gross alpha activity is mentioned: [Pg.140]    [Pg.68]    [Pg.31]    [Pg.40]    [Pg.183]    [Pg.728]    [Pg.261]    [Pg.162]    [Pg.158]    [Pg.809]    [Pg.140]    [Pg.68]    [Pg.31]    [Pg.40]    [Pg.183]    [Pg.728]    [Pg.261]    [Pg.162]    [Pg.158]    [Pg.809]    [Pg.204]    [Pg.112]    [Pg.537]    [Pg.1733]    [Pg.204]    [Pg.78]    [Pg.1779]    [Pg.71]    [Pg.75]    [Pg.69]    [Pg.30]    [Pg.30]    [Pg.34]    [Pg.41]    [Pg.43]   
See also in sourсe #XX -- [ Pg.38 , Pg.209 ]

See also in sourсe #XX -- [ Pg.9 , Pg.10 , Pg.148 ]



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