dlpcbs,即多层印制电路板,是工业生产中不可或缺的电子组件。在B2B售卖场景下,它特指那些具有复杂电路结构、高密度布线及优异电气性能的高端电路板。这类产品广泛应用于通信设备、医疗设备、工业控制等领域,满足行业对稳定性、可靠性和高效能的需求。 作为B2B买家,您可能正寻找能承载大电流、支持高速信号传输的电路板。
多氯联苯(PCBs)是持久性有机污染物(POPs)的一类,具持久性、半挥发性、生物蓄积性、高毒性等特点,是《关于持久性有机污染物的斯德哥尔摩公约》中规定的首批控制消除的12类污染物之一。类二恶英类多氯联苯(DL-PCBs)是指邻位上没有或只有一个氯原子取代基的PCBs,具有12种同系物,是PCBs中毒性最强的...
最佳答案 多氯联苯(PCBs)是持久性有机污染物(POPs)的一类,具持久性、半挥发性、生物蓄积性、高毒性等特点,是《关于持久性有机污染物的斯德哥尔摩公约》中规定的首批控制消除的12类污染物之一。类二恶英类多氯联苯(DL-PCBs)是指邻位上没有或只有一个氯原子取代基的PCBs,具有12种同系物,是PCBs中毒性最强的一类。
DL-PCBs对人类的危害使环境中,特别是食品和动物饲料中DL-PCBs的准确检测和定量变得至关重要。欧盟于2001年建立了一项监测计划,旨在限制并理想地消除二噁英和DL-PCBs在环境中的排放5,并在1883/2006号条例中规定了食品和饲料中二噁英、DL-PCBs和六种非二噁英样PCBs(NDL-PCB)的“高水平”(Maximum Levels, ML)。欧盟...
研究结果表明, 用该法分析二恶英和二恶英多氯联苯标准溶液, 平行四次的分析结果为: RSD(pCDD 力风)<8.9%,RSD(PCBs)<11.4%, 回收率可达60.105%。采用该法成功参与第十一届国际不同实验室之闻分析环境样品( 沉积物、 淤泥、 阅读了该文档的用户还阅读了这些文档 ...
网络类二恶英多氯联苯 网络释义 1. 类二恶英多氯联苯 类二恶英多氯联苯(DlPCBs)作为典型的环境内分泌干扰物,会干扰接触个体或其后代的内分泌功能,破坏机体的神经系统、免… www.stdlxb.cn|基于 1 个网页
The levels of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs) in the Pilica River and Sulejów Reservoir were found to be 46% higher during the flood season than during
The results showed that intakes for DL-PCB + PCDD/F ranged from 4.4% to 12% of the TDI, and for Pb and Cd from 1.9% to 2.7% and from 0.3% to 0.4% of the TDI, respectively. 展开 关键词: NDL and DL-PCBs dioxins metals farmed trout feed ...
Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) in fish samples have been investigated in many previous studies. However, the available data regarding this issue in low- and middle-income countries are very scarce, and no study has...
Understanding PM behavior is crucial when studying the seasonal size distribution of particle-bound organic contaminants, as their respective concentrations are strongly correlated with the PM concentration (Pearson's r of 0.811, 0.602 and 0.606 for ∑PAHs, ∑PCDD/Fs and ∑dl-PCBs, respectively). ...