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1)  Pb element
Pb元素
1.
3 μg g-1, in accord with the meaning of Index of Geoaccumulation calculated using this content of Pb element.
以合肥市大兴地区为研究区,利用表层土壤Pb元素含量数据,基于Hazen概率曲线探讨了土壤Pb元素背景含量与污染叠加含量的区分方法。
2.
In this paper,we discuss the method to distinguish background content from polluted content for Pb element in soil based on Hazen probability curve in Tongling area.
得到Pb元素的背景含量为28。
3.
Base on the mathematical model of delayed geochemical hazard (DGH), the DGH characteristics of Pb element in the soil of Daxing Town, Anhui Province is studied.
基于缓变型地球化学灾害数学模型,对合肥大兴镇地区土壤中Pb元素的缓变型地球化学灾害特征进行研究。
2)  ice core samples
痕量元素Cd和Pb
3)  Pb-Pb isotope systematics
Pb-Pb同位素
4)  lead isotope
Pb同位素
1.
Distribution characteristics of lead isotope in the dust source areas of the North of China and its trace significance are discussed.
对中国北方沙尘源区风成沙Pb同位素的分布特征以及示踪意义进行了初步研究。
2.
Season variations of Cd,Pb,Zn and Cu deposition fluxes were analyzed,and lead isotope was used to trace atmospheric particles source.
在兴化湾周围采集1年的大气颗粒物及降雨样品,测定分析了Cd,Pb,Zn和Cu 4种重金属的含量及其大气干湿沉降通量随季节的变化规律,并利用Pb同位素对大气颗粒物的来源进行了解析。
3.
We present a simplified acid leaching method for lead isotope analysis of geological samples using multiple-collector inductively-coupled-plasma mass-spectrometry (MC-ICP-MS),to remove any contamination during sample preparation.
针对地质样品的Pb同位素分析提出了一种简化淋洗法,以去除样品碎样过程引起的污染。
5)  Pb isotope
Pb同位素
1.
Pb isotope characteristics of retrograded eclogites from northern Hebei, China;
冀北退变榴辉岩的Pb同位素特征
2.
This paper presents the measurements of Pb isotope compositions of apatite, magnetite and pyrite in the Washan and Dongshan iron deposits in the Ning-Wu (Nanjing-Wuhu) area.
本文对宁芜地区铁矿床中磷灰石和矿石进行了Pb同位素测定。
3.
Heavy metals were analysed using ICP-AES and the composition of Pb isotopes analysed using ICP-MS.
利用ICP-AES对降尘中重金属元素含量进行了测定并利用ICP-MS对样品中Pb同位素组成进行了分析。
6)  U-Pb isotope
U-Pb同位素
1.
Through studying U-Pb isotopes of rock samples by reversal derivation method, this paper expounds the initial uranium mass fraction in Zhiluo Formation sand bodies of Dongsheng area, Ordos Basin.
通过岩石样品U-Pb同位素反演研究了鄂尔多斯盆地东胜地区直罗组砂体的原始铀质量分数(铀含量),其平均值达21。
2.
U-Pb isotope of zircons from gneissic adamellites are determined by LA-ICPMS in the key laboratory of continental dynamics of Northwest University,and yielded a zircon U-Pb age of 1192±.
利用LA-ICPMS(激光剥蚀等离子体质谱)测年设备,对片麻状二长花岗岩进行单颗粒锆石微区U-Pb同位素测定,获得1192±38Ma的年龄,为中元古代晚期;岩石地球化学特征显示二长花岗岩侵入体具有火山弧-同碰撞花岗岩特征。
3.
U-Pb isotope of zircons from gneissic adamellites are determined by LA-ICPMS in the key laboratory of continental dynamics of Northwest University,China,and .
太白岩基北部的巩坚沟变形侵入体—片麻状中细粒二长花岗岩中获得1741±12Ma的LA-ICPMS单颗粒锆石微区U-Pb同位素年龄;岩石地球化学资料研究证明,巩坚沟片麻状中细粒二长花岗岩形成于板块边缘的俯冲-碰撞构造环境,岩浆源于部分熔融的中上地壳物质。
补充资料:PB
分子式:
CAS号:

性质: 由1-丁烯均聚或与少量其他α-烯烃共聚而成的一种热塑性树脂。结晶度50%~55%,密度0.91~0.915g/cm3。拉伸强度28~32MPa,悬臂梁缺口冲击不断,邵氏硬度D32~55。脆化温度<-187℃,维卡软化点113~121℃。有突出的耐环境应力开裂性,而且抗蠕变性、耐磨性、耐化学药品性、耐热性好,可在-30~100℃下长期使用。可采用齐格勒-纳塔催化剂,经浆液聚合、本体聚合或气相聚合制得。在加工成制品时存在晶形转变问题。在室温和常压下,大约5~7天后才逐渐由不稳定的II型晶态转变成稳定的I型晶态。主要用于热水管、工业用管、气体管等,用以代替铜管或铝管,也用于薄膜,板材、容器、密封件、单丝等。

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