1) hydrogen isotope ratio
氢同位素比值
1.
Climatic implication of hydrogen isotope ratios of terrigenous n-alkanes in lacustrine surface sediment of the Tibetan Plateau;
青藏高原湖泊表层沉积物中陆源正构烷烃氢同位素比值的气候意义
2.
To explore the climatic implication of compound-specific hydrogen isotope ratios of sedimentary n-alkanes, the author sampled shallow sediment cores respectively from the climatically and environmentally distinct basins Qiangyong Glacier Lake,Kongmu Co Lake,Nam Co Lake, Keluke Lake and Xiao Qaidam Lake along a S-N transect on the Tibetan Plateau for the extraction and analysis of these biomarkers.
本文分别在青藏高原南部的大枪勇错、空姆错,中部的纳木错以及东北部的克鲁克湖和小柴达木湖钻取了浅岩芯,通过对沉积物中正构烷烃的提取分析和单体氢同位素比值的测定来探讨该类生物标志物单体δD值的气候指示意义。
2) hydrogen and oxygen isotope ratios
氢氧同位素比值
3) Isotope ratios
同位素比值
1.
In recent years,with the improvement of sensitivity and resolution,its application was increasing to determine radionuclides content and isotope ratios.
近年来,随着检测灵敏度和分辨率的提高,该技术在放射性核素含量和同位素比值测定中的应用日益突出。
5) isotopic ratio
同位素比值
1.
The results show the isotopic ratio for 143Nd/ 144Nd is 0.
采用 VG Axiom型多接收双聚焦等离子质谱仪 ( MC-ICPMS)测定 Nd、Pb、U同位素比值 ,应用指数公式对测定的结果进行质量歧视校正。
6) lead isotope ratios
铅同位素比值
1.
Lead isotope ratios of tea soil from different regions in Fujian Province were determined by inductively coupled plasma mass spectrometry, the differences of lead isotope ratios (206Pb/207Pb-206Pb/208Pb).
本研究利用电感耦合等离子体质谱测定了福建不同茶园土壤的铅同位素比值,比较了土壤全消解和残渣态两种赋存形态的铅同位素比值的差异,发现残渣态的铅的地域性特征较强,可用来作为地区土壤的判别依据。
2.
Based on the analytical method, lead isotope ratios of Danshen could be accurately measured.
建立了用微柱流动注射与电感耦合等离子体质谱联用的铅同位素比值测量方法。
补充资料：氢同位素动力学同位素效应
分子式：
CAS号：
性质：在化学反应过程中反应物本身因同位素取代而改变能态，引起化学反应速度的差异。氢同位素动力学同位素效应很大，α=kH/kD可达2～10左右。0℃时Al4C3与水反应α=3.9，30℃时Fe与H2SO4反应α=6.6。轻水电解时比重水分解速度快，动力学同位素效应随电极材料、电解条件而变，氢-氘的α在3～12之间。当前采用减容电解来制取终浓重水。
CAS号：
性质：在化学反应过程中反应物本身因同位素取代而改变能态，引起化学反应速度的差异。氢同位素动力学同位素效应很大，α=kH/kD可达2～10左右。0℃时Al4C3与水反应α=3.9，30℃时Fe与H2SO4反应α=6.6。轻水电解时比重水分解速度快，动力学同位素效应随电极材料、电解条件而变，氢-氘的α在3～12之间。当前采用减容电解来制取终浓重水。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条