Rapid determination of low concentrations of long-lived alpha-emitters in the atmosphere by alpha-spectrometry

1973 ◽  
Vol 13 (1) ◽  
pp. 235-246 ◽  
Author(s):  
R. Winkler ◽  
H. Hötzl
Keyword(s):  
Alpha Spectrometry ◽  
Rapid Determination ◽  
Alpha Emitters ◽  
Low Concentrations

Rapid determination of alpha emitters using Actinide resin

2004 ◽  
Vol 61 (2-3) ◽  
pp. 287-291 ◽  
Author(s):  
N Navarro ◽  
L Rodriguez ◽  
A Alvarez ◽  
C Sancho
Keyword(s):  
Rapid Determination ◽  
Alpha Emitters

THE RAPID DETERMINATION OF LOW CONCENTRATIONS OF CARBON MONOXIDE IN AIR

1948 ◽  
Vol 26f (8) ◽  
pp. 318-330 ◽  
Author(s):  
Morris Katz ◽  
John Katzman
Keyword(s):  
Carbon Monoxide ◽  
Flow Rate ◽  
Rapid Determination ◽  
Major Change ◽  
Space Velocity ◽  
Optimum Flow Rate ◽  
Low Concentrations ◽  
High Space ◽  
Optimum Flow

A granular form of silver permanganate on a zinc oxide carrier has been found to oxidize carbon monoxide in air at ordinary temperatures and at high space velocities. There is no noticeable change in activity over the range of 30 to 100% relative humidity of the air, although a small amount of water vapor is essential to initiate the combustion of carbon monoxide. The above properties have been utilized in the rapid determination of low concentrations by measuring the heat of oxidation in a thermocouple cell. The relation between the potential of the thermocouple junctions and the concentration of carbon monoxide is linear over the range of 0 to 600 p.p.m. at a definite space velocity. With increasing flow rate at a constant concentration the potential rises rapidly to a maximum, but in the range of optimum flow the flow rate may be varied considerably without producing a major change in e.m.f. The thermal efficiency is about 81% at the optimum flow rate. Hydrogen, unless it is present in amounts considerably in excess of the carbon monoxide concentration, does not introduce an appreciable error in the determination. The method is applicable to the field determination of considerably less than 0.005% carbon monoxide in air and the degree of precision is about equal to that of most laboratory methods. Twenty to twenty-five cubic centimeters of the material will give a useful life of over eight hours in continuous tests on concentrations below 0.1% carbon monoxide.

A kinetic spectrophotometric assay for rapid determination of acetoacetate in blood.

1977 ◽  
Vol 23 (10) ◽  
pp. 1893-1897 ◽  
Author(s):  
C P Price ◽  
B Llyod ◽  
G M Alberti
Keyword(s):  
Reaction Rate ◽  
Rapid Determination ◽  
Good Precision ◽  
Need For Care ◽  
Kinetic Assay ◽  
Low Concentrations ◽  
Kinetic Spectrophotometric ◽  
The Stability ◽  
Beta Hydroxybutyrate

Abstract We describe an automated kinetic assay for acetoacetate in blood. Acetoacetate is enzymatically reduced to D-beta-hydroxybutyrate and the reaction is monitored for 60 s with a reaction-rate analyzer. This technique allows low concentrations of acetoacetate to be measured with good precision and overcomes many of the problems associated with other automated techniques. Our studies on the stability of acetoacetate emphasize the need for care in handling specimens. The use of a reaction-rate analyzer, an item of equipment common to most laboratories, allows for rapid handling of samples in small or large batches, depending on the needs of the laboratory.

Rapid determination of thorium-230 in mill tailings by .alpha. spectrometry

1987 ◽  
Vol 59 (21) ◽  
pp. 2556-2558 ◽  
Author(s):  
Stephen. Donivan ◽  
Mark. Hollenbach ◽  
Mary. Costello
Keyword(s):  
Alpha Spectrometry ◽  
Rapid Determination ◽  
Mill Tailings

Rapid determination of 210Pb and 210Po by sequential cloud point extraction for environmental monitoring

2021 ◽  
Author(s):  
Guillaume Blanchet-Chouinard ◽  
Dominic Larivière
Keyword(s):  
Environmental Monitoring ◽  
Cloud Point ◽  
Alpha Spectrometry ◽  
Cloud Point Extraction ◽  
Rapid Determination ◽  
Icp Ms

A new sequential cloud point extraction (CPE) procedure was developed and validated for the determination of 210Pb and 210Po by ICP-MS/MS and alpha spectrometry, respectively. Two distinct CPE systems using...

Rapid determination of radium-224/226 in seawater sample by alpha spectrometry

2017 ◽  
Vol 171 ◽  
pp. 169-175 ◽  
Author(s):  
Lijuan Song ◽  
Yonggang Yang ◽  
Maoyi Luo ◽  
Yan Ma ◽  
Xiongxin Dai
Keyword(s):  
Alpha Spectrometry ◽  
Rapid Determination ◽  
Seawater Sample

Determination of beta-choriogonadotropin in human plasma; evaluation and comparison of five "kit" methods.

1980 ◽  
Vol 26 (13) ◽  
pp. 1890-1895 ◽  
Author(s):  
B S Knox ◽  
J W McKee ◽  
P I Hair ◽  
J T France
Keyword(s):  
Early Diagnosis ◽  
Rapid Determination ◽  
Beta Subunit ◽  
Reliable Determination ◽  
Men And Women ◽  
Trophoblastic Disease ◽  
Human Choriogonadotropin ◽  
Low Concentrations ◽  
Trophoblastic Tumors

Abstract We evaluated five quantitative, commercially available radioimmunoassay methods (Beta-Tec, BIO-RIA, Cambridge Nuclear, Mallinckrodt, and Serono) for rapid determination of the beta-subunit of human choriogonadotropin in serum or plasma. Only three of the kits (Beta-Tec, Mallinckrodt, and Serono) were found suitable for reliable determination of low concentrations of this analyte, which is of importance in the early diagnosis of trophoblastic disease in men and monitoring effectiveness of chemotherapy of trophoblastic tumors in men and women.

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