構成的化學元素
Elemental composition can vary within the same copper-ore lode, usually because of varying admixtures of other elements, especially iron, lead, zinc, and arsenic.
即使在同一銅礦礦脈中，元素構成也會發生差異，這一般是因為其它元素，尤其是 鐵、鉛、錫、和砷等程度不同的混合。
Elemental composition and BET surface area of pyrolysis carbon were investigated. X-ray diffraction pattern and constant-current charge-discharge properties of pyrolysis carbon were stu***d.
元素分析、氮氣物理吸附和X射線衍射分别考察了裂解炭的元素組成、BET比表面積以及微晶結構變化；
The mass concentration, water-soluble ions and elemental composition of fine particles were detected by the weighing method, ion chromatography, inductively coupled plasma chromatography separately.
用稱重法、離子色譜法和電感耦合等離子質譜法分别測得細顆粒物的質量濃度、水溶性離子和元素組成。
But when it comes to our elemental composition, we're not a carbon copy.
然而，要說到地球上的另外一個主要組成元素——碳，則全部來自地球，非常純正。
It has been found that the new elemental composition in extrusion moulding is epoxy and paraffin. and the precision zirconia ceramic ferrules have been obtained.
獲得了環氧樹脂和石蠟兩種新的二氧化锆成型配方。
The relative atomic percent contents (A. C. %) of the golden film calculated at the constant elemental composition section on the AES profile curves were O 56.9%;
從AES深度分布曲線的組成恒定區求得各組成元素的相對原子百分濃度（A.C。%）為：O 56.9%；
Elemental composition analysis, proximate fuel analysis and fuel composition analysis of sawdust briquette fuel were done in the experiment.
試驗分别對木屑緻密成型燃料進行了元素分析、工業分析和燃料組成分析。
The caustic extract of Jinan FCC LCO was found to comprise over 70 phenols by elemental composition, IR and GC/MS analyses.
采用元素組成、IR和GC/MS等方法對濟南煉油廠的催化裂化柴油堿洗出物進行分析 ，鑒定出70多個酚類化合物。
Surface elemental composition was analyzed qualitatively by X-ray photoelectron spectroscopy (XPS). Surface heparin content was detected by toluidine blue O(TBO).
采用水接觸角、X射線光電子能譜（XPS）、*********藍法（TBO）對所修飾的材料進行了表征。
A sample of a single compound may be analyzed to establish its elemental composition or molecular structure;
單一化合物的樣品，可藉由化學分析以明了其元素組成或分子結構；
Firstly, they were identified by authors as ultra microfossils instead of ultra microbes based on their morphology, structure and elemental composition.
首先，它們是筆者根據形态、結構和元素成分作為超微生物化石進行鑒定的。
The PET fibers are treated by cold plasma technology and the elemental composition and the type of functional groups of the surface of PET was analyzed by ESCA.
采用冷等離子體技術處理滌綸纖維，利用ESCA分析了冷等離子體處理前後的纖維表面元素組成、官能團類型的變化。
Thus the training samples were established using the elemental composition of the frictional pair materials as the inputs of ANN and the corresponding frictional parts as the outputs of ANN.
将機械摩擦副材質的元素含量作為神經網絡輸入，将材質所對應的部件作為神經網絡輸出，建立了相應的神經網絡訓練樣本；
Objective: To evaluate the influence of air oxidation, anodizing and TiN coating sample on elemental composition and thickness of surface film of cast pure titanium.
目的：評價大氣熱氧化、陽極氧化和氮化钛鍍膜對鑄造純钛表面膜組成和厚度的影響。
The elemental composition and valence state of the elements and their changes with the variation of depth were investigated by mains of XPS.
用XPS研究了滲硼層磨損表面的成分、元素價态及其隨深度的變化。
The elemental composition and the temperature of thermal explosion are principal factors to influence the reactions and morphology of the products.
體系成分和熱爆溫度是影響反應及産物形态的主要因素。
Analysed the bulk elemental composition, the surface elemental distribution and chemical structure of the CBp. The results show that CBp has more inorganic components and volatile components.
較為全面地分析得到了再生炭黑的整體組成、元素構成以及表面化學特性。
The paper describes in detail the system consisting of network architecture, elemental composition, method of realization, software module and modular function etc. The application of the syst…
本文詳細介紹該系統網絡結構、基本構成、實現方法、軟件模塊和模塊功能等。
Trace elements in soil of Tumotezuoqi were similar to the background levels of elemental composition of soil in the world.
土壤中微量元素的含量與世界土壤背景值相似。
The elemental composition and concentrations of trace elements in seawater, suspended matters, and marine rain are presented for samples collected at the Western Pacific Regions.
本工作測定了西太平洋海域中海水、海水懸浮物和海面上雨水的元素組成和濃度。
The elemental composition, properties and main uses of the wollastonite short fiber were described. The wollastonite short fiber fiberglass epoxy resin EMI 2.4 composite was stu***d.
本文叙述了矽灰石短纖維的組成、性質及主要作用，重點研究矽灰石短纖維—玻璃纖維—環氧樹脂—咪唑纏繞增強體系。
Combined with the results of INAA and glaze study, this change in elemental composition should be caused by the change in porcelain raw materials or body-****** crafts.
結合中子活化分析及瓷釉研究的結果來看，這種改變應是因其制瓷原料或胎料配方發生變化引起的。
The choreography of composite services defines their flow and composition from elemental services.
組合服務的編排通過基本服務定義其流程和組成。
Using XPS and imaging XPS analyses, we have investigated the surface chemical composition and elemental distribution of PCL/PVC films.
用XPS和成象XPS分析技術，對PCL/PVC膜的表面化學組成和元素分布情況進行了研究。
The composition and structure were analyzed through elemental analysis, molar conductance, IR, UV-Vis and X-ray powder diffraction.
通過元素分析、摩爾電導、紅外光譜、紫外-可見光譜、X-射線粉末衍射對三元配合物的組成和結構進行了分析。
The monomer reactivity ratios of NPMI with StAN in radical copolymerization are determined at 60 in benzene solution, and the composition of the terpolymer is calculated by elemental analysis.
測定了60℃下N-苯基馬來酰亞胺在苯溶劑中分别與*********、丙烯腈共聚的二元競聚率，并據此估算其三元共聚物組成。
Elemental and TG analysis confirmed the purity, The composition and structure of DBC-chlorophosphonazo were also determined.
并用元素分析和熱重分析确證了其純度。對DBC-偶氮氯膦的組成和結構也進行了測定。
Lanthnide complexes of diacethyldioxime were synthesed. The composition and structure of the complexes were determined by elemental analysis, IR, UV-Vis and mole-conductivity.
合成了*********二肟的稀土金屬配合物，并通過元素分析、紅外光譜、紫外光譜及摩爾電導測定，初步确定了配合物的結構。
元素組成（Elemental Composition） 指物質中所有化學元素的種類及其相對比例（通常以質量百分比、原子百分比或摩爾分數表示）。它描述了構成該物質的基本化學元素是什麼，以及每種元素所占的分量，是物質化學本質的核心特征之一。
核心含義解析：
測量與重要性：
應用領域舉例：
總結來說，元素組成是描述物質由哪些基本化學元素構成以及它們之間定量關系的核心概念，是連接物質的微觀構成與其宏觀性質、行為和應用的關鍵橋梁。
“Elemental composition”（元素組成）指物質中不同化學元素的種類及其相對含量，通常以質量百分比、原子百分比或摩爾比的形式表示。這一概念廣泛應用于化學、地質學、材料科學和環境科學等領域。
元素種類
指物質包含的化學元素，例如水的元素組成是氫（H）和氧（O），而空氣主要由氮（N）、氧（O）、氩（Ar）等元素構成。
相對比例
各元素在物質中的占比，例如二氧化碳（CO₂）中碳和氧的原子比為1:2，質量比為12:(16×2)=3:8。
分析方法
應用場景
若某化合物分子式為C₆H₁₂O₆（葡萄糖），其元素組成的質量百分比可計算為：
$$
text{碳占比} = frac{6 times 12}{6 times 12 + 12 times 1 + 6 times 16} times 100% approx 40%
$$
同理可得氫和氧的占比。
若需進一步了解具體分析方法或案例，建議參考化學教材或專業文獻。
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