DETERMINATION OF O-18 CONCENTRATIONS IN MICROSAMPLES OF BIOLOGICAL-FLUIDS

被引：5

作者：

COHEN, DD

BRADSHAW, SD

BRADSHAW, FJ

KATSAROS, A

机构：

[1] AINSE,MENAI,NSW 2234,AUSTRALIA

[2] UNIV WESTERN AUSTRALIA,DEPT ZOOL,NEDLANDS,WA 6009,AUSTRALIA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1990年 / 50卷 / 1-4期

关键词：

D O I：

10.1016/0168-583X(90)90327-Q

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The 18O(p, α)15N reaction has been developed for the analysis of musamples of biological fluids containing 18O-enriched water. Samples as small as 50 μl have been used. Well characterized Ta2O5 targets were prepared from these fluids and irradiated with several hundred nA of protons from the 3 MV Van de Graaff at Lucas Heights. The broad (47 keV) 846 kV resonance in this reaction was used to measure 18O concentrations down to natural backgrounds (0.2 at.%) in a few minutes of accelerator running time. Concentrations of 18O from 0 to 5 at.% were measured in body fluids in small Australian lizards directly after doping with 18O-enriched water and then again after several days of roaming around in their natural desert environments. The changes in these levels were related to the metabolic rates of these animals. © 1990.

引用

页码：43 / 47

页数：5

共 7 条

[1] MICROANALYSIS OF STABLE ISOTOPES OF OXYGEN BY MEANS OF NUCLEAR REACTIONS [J].