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1)  trace lead
痕量铅
1.
Determination of trace lead in water by graphite furnac e atomic absorption;
石墨炉原子吸收法测水中痕量铅
2.
Determination of trace lead in crude oils by trioctylamine extraction-spectrophotometry;
正三辛胺萃取-分光光度法测定原油中的痕量铅
3.
Determination of Trace Lead in Mongolian Medicine by Spectrophotometry;
分光光度法测定蒙药中痕量铅
2)  determination of trace lead
痕量铅测定
3)  Trace Pb and Cd
痕量铅和镉
4)  The trace lead and nickel
痕量铅和镍
5)  Trace lead in Tea
茶叶中痕量铅元素
6)  trace [英][treɪs]  [美][tres]
痕量
1.
Recent Progress of Inorganic Trace Analysis by Mass Spectrometry;
质谱的无机痕量分析进展
2.
Determination of Trace Phosphine by Gas Chromatography;
气相色谱-氮磷检测器分析痕量磷化氢
3.
Determination of ultratrace plumbum by catalytic spectrophotometry;
催化光度法测定超痕量铅
补充资料:铅-铅测年
分子式:
CAS号:

性质:238U和235U两个母体铀同位素的特性实质相同,所产生的放射性成因206,207Pb的方程可合并为(207Pb/206Pb)=[(235U/238U)](t-1)。235U/238U现在的比值是1/137.8,利用非放射性成因‘稳定’204Pb作为参考同位素,作(207Pb/204Pb)与(206Pb/204Pb)的Pb-Pb等时线,应用方程计算年龄,式中(207Pb/204Pb)和(206Pb/204Pb)0是初始比值。

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