对浙江江山碓边下寒武统上部—下奥陶统下部碳酸盐岩进行了碳氧同位素测定。
The studied carbonate rocks dealt with in this paper were collected from the classic section of the Cambrian to Lower Ordovician age at Duibian of Jiangshan, Zhejiang.
根据碳同位素测定，该亚麻布产于1260年至1390年之间，不过许多人坚持认为这是伪造的。
Radio carbon dating puts the origin of the shroud between 1260 C. E. and 1390 C. E., consistent with the theory that it was a forgery.
气温变化周期是根据氧同位素测定的大量远古温度记录而推演出来的。 气温变化周期与人类演化进程的对照，暗示“黄金时期”与气候急剧波动而短暂的时期相对应。
What marked out this period was a greater range of recorded temperatures, suggesting it was a time of rapid but short-lived fluctuations in climate.
西姆斯使用放射性计时器测定并比较氡的两种同位素，以此来解密火山的活跃程度。
Sims USES radioactive clocks to decipher volcanic processes, measuring and comparing two isotopes of radon.
建立稳定同位素稀释技术测定蜂蜜中氯霉素（CAP）分析方法。
To determine the content of Chloramphenicol(CAP) in honey using stable isotope dilution technique.
用热表面离子源测定了锂同位素丰度，在样品全耗尽过程中累计离子流强度。
The isotopic ratio of lithium was determined by cumulating intensity of ion current during evaporation of all samples on evaporation filament.
本文介绍了离子流强度累计测定同位素比的方法。
A method by cumulative intensity of ion current to analyse isotopic ratio is proposed in present paper.
该系统使用单束法能测定13个同位素峰。
This system can determine 13 isotopic peaks by single beam method.
每当测定非常低的浓度和同位素丰度时总是首先使用无机质谱法。
Spectrometry is preferably used each time extremely low concentrations and isotopic abundance are to be determined.
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。
In recent years, with the improvement of sensitivity and resolution, its application was increasing to determine radionuclides content and isotope ratios.
每当测定非常低的浓度和同位素丰度时总是首先使用无机质谱法。
Inorganic Mass Spectrometry is preferably used each time extremely low concentrations and isotopic abundance are to be determined.
该成果对质谱中的热电离理论进行了较深入地讨论，建立了高精度质谱测定锂铟铈同位素的方法。
The theory of thermal ionization mass spectrometry has been deeply discussed and the procedures for high-precision measurement of isotopes of lithium, indium and cerium have been established.
此仪器可用于气体分析以及轻元素的同位素丰度测定。
This instrument can be used for gas analysis and determine of isotopic abundance of light elements.
培养结束，测量神经突起长度、密度后，取出标本作同位素放射性测定。
After the culture end and the measurement of the length and density of neural axons, the samples were taken out for isotopic radioactive measurement.
目的：建立测定水产品中呋喃唑酮、呋喃它酮、呋喃西林和呋喃妥因等硝基呋喃代谢物的同位素内标稀释高效液相色谱-串联质谱法。
Objective:To develop a method for determining the metabolites of nitrofuran antibiotics in aquatic products by HPLC-MS/MS using isotope internal standard dilution technique.
康定杂岩以往被认为是扬子地块太古宇的基底，但近年来的同位素年龄测定结果表明其并不是形成于太古宙。
The complex was traditionally considered as the Archean basement of the Yangtze Block, but recent isotopic dating results indicate that it was not formed in Archean.
概述了钙同位素分馏机理、分析测定以及在环境地球化学研究中的应用。
Fractionation mechanism, analytical method and its applications in environmental geochemistry of calcium isotopes are summarized in this paper.
介绍了采用同位素稀释质谱 法（IDMS）测定 冻干人尿样品中镍、铜、铅的含量。
The method of determining Ni, Cu and Pbi n urine with isotope dilution mass spectrometry(IDMS)is described.
测定了某些地质样品的碳、氧同位素组成，并对其在地质上的应用作了解释。
Carbon and oxygen isotope compositions of some geological samples have been measured and its application to geology has been interpreted in this paper.
溶液中加入铱元素进行铼同位素的质量分馏校正，在常规的溶液雾化进样条件下，采用同位素稀释法可准确测定纳克级的铼含量。
Combining the isotopic dilution (ID) method with the on-line fractionation correction method, the rhenium content can be determined accurately at sub-nanogram level using the normal solution n.
一种碳的天然放射性同位素，原子量为4，半衰期为5，780年，用于测定古代生物标本，地质标本或考古遗迹的标本的年代。
A naturally radioactive carbon isotope with atomic mass 4 and half-life 5,780 years, used in determining the age of ancient organic, geologic, or archaeological specimens.
利用增量方法和同位素交换技术，对角闪石族矿物的氧同位素分馏进行了理论计算和实验测定。
Oxygen isotope fractionation in amphiboles was determined by theoretical calculation using the increment method and by experimental measurement using isotope exchange technique.
治疗前后用同位素放免法测定血浆脑钠尿肽(BNP)水平以及心功能。
Plasma levels of brain natriuretic peptides (BNP) were measured by radioimmunoassay and immunoradiometric assay in these patients before and after treatment.
并对青海大柴旦地区和湖北潜 江地区的石盐中的硼进行了提取和同位素组成的测定；
The isotopic compositions of boron in halites from Qaidam Basin, Qinghai Province and Qianjiang, Hubei Province were measured.
本文介绍了用(232u)作示踪同位素，测定岩石、土壤、水体中铀同位素及岩石中钍同位素比活度的方法。
This paper presents a determination method of specific activity for uranium isotope in rocks, soil, water and thorium isotope in rocks using 232u as a tracer isotope.
本文论述了同位素示踪测井技术在测定地下水含水层参数方面的应用。
The application of radioistope tracer log to detect the parameters of groundwater and aquifers is stated.
本文论述同位素示踪法测定多含水层混合井的试验研究及应用。
This paper discusses the experimental study and application of tbe isotope tracing method to that the multi-aquifer mixed well.
具体结论如下：石墨发射剂的量和涂样顺序对硼同位素比值的测定有一定的影响。
The results showed as the following: The content of graphite as loading agent and the sequence of loading graphite and the sample to the filament affect the boron isotopic ratios.
具体结论如下：石墨发射剂的量和涂样顺序对硼同位素比值的测定有一定的影响。
The results showed as the following: The content of graphite as loading agent and the sequence of loading graphite and the sample to the filament affect the boron isotopic ratios.
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