OXYGEN ISOTOPIC ANALYSIS OF SILVER ORTHOPHOSPHATE USING A REACTION WITH BROMINE

被引:44
作者
STUARTWILLIAMS, HL
SCHWARCZ, HP
机构
关键词
D O I
10.1016/0016-7037(95)00304-I
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
A simple and precise method of determining the oxygen isotopic composition of Ag3PO4 has been developed in which orthophosphate is condensed to pyrophosphate and higher polymeric forms at elevated temperatures using Br-2 as a reactant in a heated quartz vessel, releasing about 17.5% of the oxygen present as O-2 gas. The O-2 is converted to CO2 using a heated carbon rod and analyzed using a mass spectrometer. The precision of the delta(18)O determination is better than 0.07 parts per thousand when reaction furnace temperature is regulated to within +/- 0.5 degrees C. This method offers advantages of speed, safety, and cost over conventional BrF5 decomposition of silver phosphate.
引用
收藏
页码:3837 / 3841
页数:5
相关论文
共 16 条
[1]   THERMOPHYSIOLOGY OF TYRANNOSAURUS-REX - EVIDENCE FROM OXYGEN ISOTOPES [J].
BARRICK, RE ;
SHOWERS, WJ .
SCIENCE, 1994, 265 (5169) :222-224
[2]  
BRODSKII AI, 1953, DOKL AKAD NAUK SSSR+, V92, P589
[3]   O-18 CONTAINING PHOSPHATE AND RELATED COMPOUNDS [J].
COHN, M .
METHODS IN ENZYMOLOGY, 1957, 4 :905-914
[4]   PREPARATION OF PHOSPHATE SAMPLES FOR OXYGEN ISOTOPE ANALYSIS [J].
CROWSON, RA ;
SHOWERS, WJ ;
WRIGHT, EK ;
HOERING, TC .
ANALYTICAL CHEMISTRY, 1991, 63 (20) :2397-2400
[5]   PRECIPITATION OF SILVER PHOSPHATE FROM HOMOGENEOUS SOLUTION [J].
FIRSCHING, F .
ANALYTICAL CHEMISTRY, 1961, 33 (07) :873-&
[6]   THE IMPLICATION OF THE OXYGEN ISOTOPE RECORDS IN COEXISTING CHERTS AND PHOSPHATES [J].
KARHU, J ;
EPSTEIN, S .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1986, 50 (08) :1745-1756
[7]   OXYGEN ISOTOPE VARIATIONS IN PHOSPHATE OF BIOGENIC APATITES .1. FISH BONE APATITE - RECHECKING THE RULES OF THE GAME [J].
KOLODNY, Y ;
LUZ, B ;
NAVON, O .
EARTH AND PLANETARY SCIENCE LETTERS, 1983, 64 (03) :398-404
[8]   OXYGEN ISOTOPES IN MAMMAL BONE PHOSPHATE - A NEW TOOL FOR PALEOHYDROLOGICAL AND PALEOCLIMATOLOGICAL RESEARCH [J].
LONGINELLI, A .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1984, 48 (02) :385-390
[9]   OXYGEN ISOTOPE VARIATIONS IN PHOSPHATE OF DEER BONES [J].
LUZ, B ;
CORMIE, AB ;
SCHWARCZ, HP .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1990, 54 (06) :1723-1728
[10]  
MCARTHUR JM, 1990, GEOL SOC SPEC PUBL, V52, P119, DOI 10.1144/GSL.SP.1990.052.01.08