相关实验视频

Updated: Jul 4, 2026

Cryo-electron Microscopy Specimen Preparation By Means Of a Focused Ion Beam
10:54

Cryo-electron Microscopy Specimen Preparation By Means Of a Focused Ion Beam

Published on: July 26, 2014

27.1K

来自奥斯陆和布达佩斯的城市气溶中的尺寸分辨的元素组成和物种化

Balázs Berlinger1, Zoltán Hunyadfalvi2, Stefan Tanda3

  • 1Department of Animal Hygiene, Herd Health and Mobile Clinic, University of Veterinary Medicine, Budapest, 1078, Hungary.

Environmental geochemistry and health
|January 8, 2026
PubMed
概括

这项研究分析了奥斯陆和布达佩斯的颗粒物,发现细颗粒含有有害元素,如,而粗颗粒与土壤和尘埃有关. 船舶运输和生物质燃烧被确定为主要的污染源.

关键词:
与燃烧有关的污染.丰富系数 (EF) 是一个丰富系数.无机是一种无机.季节性变化季节性变化来源分配的分配方式

更多相关视频

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package06:37

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package

Published on: September 17, 2021

5.0K
Microsampling in Targeted Mass Spectrometry-Based Protein Analysis of Low-Abundance Proteins10:21

Microsampling in Targeted Mass Spectrometry-Based Protein Analysis of Low-Abundance Proteins

Published on: January 13, 2023

2.9K

相关概念视频

Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...