有害元素

硫是煤中的有害元素，煤在燃烧过程中，煤中的硫通常生成SO2而排入大气中，从而导致大气污染。

Sulfur in coal is a toxic element which can lead to air pollution during coal combustion .

进一步研究发现，火山活动导致了古生态环境中As、Hg、S等有毒、有害元素异常的增高。热河生物群灾难事件的发生层位（如SYP1的39层）多是古生态环境的突变层位。

A comprehensive research confirms that the volcanic activity resulted in the high level of toxic element abnormal , such as As , Hg and S. The disaster beds of Jehol Biota correspond to the beds with paleo-environmental mutation .

超临界CO2配合萃取巴戟天中的有害元素

Extraction of harmful elements from Morinda officinalis How by using supercritical CO_2 with a chelating agent

皮革中有害元素Cr（VI）的分光光度测定法

Determination of Harmful Element Chromium ( VI ) in Leather with Spectrophotometry

有害元素Sn、Pb含量对不锈钢热加工性能的影响

Effect of Deleterious Element Sn and Pb Content on Hot Workability of Stainless Steel

有害元素对Sialon结合SiC砖的侵蚀研究

Study on erosion of harmful elements to Sialon compound SiC bricks

56种药材内有害元素As、Hg的含量比较

Comparison of Arsenic and Mercury in 56 Kinds of Chinese Herbal Medicine

玩具材料和涂料中可溶出的有害元素的ICP光谱法测定

ICP spectrometric determination of migrated toxic elements in toy materials and coatings

有害元素Cd、Pb均未检出，核桃仁中As含量较高。

Harmful elements Cd , Pb were not determined while the content of As in the walnut was higher .

氯是煤中的有害元素之一，煤燃烧时氯一部分以HCl的形式释放出来，一部分则生成三致剧毒有机氯化物&二恶（口英）和呋喃。

Chlorine is one of the pernicious elements in coals .

ICP-AES法测聚氯乙烯管材中有害元素的研究

Study on the Simultaneous Determination of Harmful Trace Elements in PVC-U Pipes by ICP-AES

有害元素（K，Na，Zn，Pb）对高炉用耐火砖的侵蚀实验

Experimental Study on Erosion of Hazardous Elements ( K , Na , Zn , Pb ) to Refractory Brick for Blast Furnace

ICP-MS法同时测定食品中8种微量有害元素的方法研究

Simultaneous determination of 8 trace toxic elements in food by ICP-MS

ICP-MS法测定中成药中5种有害元素的方法研究

Determination of 5 hazard elements in Chinese patent medicine by ICP-MS

Fe是合金中的有害元素，但其对导电率影响不大，其含量应低于0.2%；

Fe , as a harmful element of alloy , has little effect on the conductivity , whose content should be lower than 0.2 % .

在已测定的15种矿物元素中，含有9种人体必需元素，其中Ca、Fe、Mg的含量较高：有害元素Hg、Pb、As及Cd的含量较低。

15 mineral elements had been determined , including 9 essential elements among which the contents of Ca , Fe and Mg were higher .

煤泥中所有微量有害元素均相对富集，以Hg的相对富集率最高，达78.4%。

The toxic trace elements in the coal slime are all enriched , and Hg is the highest enriched .

TSP的含量严重超标；有害元素不超标。

The density of TSP went beyond the standard greatly ; Harmful elements do not exceed the standard .

目前发达国家焊丝生产占焊材的30%～40%，其产品中的有害元素P、S含量实际低于0.02%；

The production of welding wires in advanced foreign countries accounts for 30 % ~ 40 % of the welding consumables , and the P & S contents are actually lower than 0.02 % ;

为了同时把有害元素w（N）降至15×10-6以下，进行了125炉次的深脱氮工艺试验。

The deep denitrogenation experiments of 125 heats were carried out to reduce the nitrogen content below 15 × 10 ~ ( - 6 ) during decarbonization process .

ICP-AES法测定易拉罐铝合金中的有害元素

Determination of harmful elements in aluminium alloys for the tin of beverage by inductively coupled plasma atomic emission spectrometry

本文应用AFS、ICP－MS分析技术，测定14种出口中成药中微量有害元素的含量。

Contents of harmful trace elements in fourteen exporting Chinese traditional medicine were determined using AFS and ICP-MS.

郑州市郊区蔬菜对有害元素汞（Hg）的富集规律研究

Study on regulations that harmful element ( Hg ) is absorbed in soil - vegetables system in the suburb of Zhengzhou city

ICP-MS法测定氧化钆中铅、镉、汞、砷等有害元素

Determination of As , Cd , Hg , Pb Hazardous Elements in Gadolinium Oxide by ICP-MS

用PIXE方法测定出口蜡笔中的有害元素

The PIXE Measurement Method of Harmful Elements in Wax Crayon for Export

运用TEM和AES等对显微组织结构的研究显示，有害元素P在晶界的偏聚和晶界碳化物的粗化是材料性能退化和致脆的原因。

The microstructure studies indicate that the segregation of harmful element P and the coarsened carbides at prior austenite boundaries result in the degradation of properties and embrittlement .

有毒有害元素如Tl、Hg等含量很低，不会造成环境问题。

Toxic and harmful elements such as Tl , Hg content is very low and so will not cause environmental problems .

稀土元素几乎是唯一能与钢中Pb、Sn等有害元素化合的元素，这是因为稀土元素电子结构特殊而具有极强的化学活性。

The RE elements are nearly only elements that can be compound with harmful elements such as Pb , Sn and so on in the steel .

TAM胶粘剂中铅镉汞铬砷有害元素的测定

Simultaneous determination of harmful elements Pb , Cd , Hg , Cr and As in ATM adhesives

实验表明，兰州百合中含有丰富的Zn，Fe，以及Cu，Mn，有害元素Pb和Cd未检出。

The experimental result indicates that there are abundant Zn , Fe , Cu and Mn in the Lanchow lily , but there are no harmful elements Pb and Cd .