Dramatic Improvement in Sensitivity with Pulsed Mode Charge Detection Mass Spectrometry.
Dramatic Improvement in Sensitivity with Pulsed Mode Charge Detection Mass Spectrometry.
复制标题
脉冲模式电荷检测质谱法的灵敏度显着提高。
DOI:
10.1021/acs.analchem.9b03586
复制
发表时间:
2019
影响因子:
7.4
通讯作者:
Jarrold,MartinF
中科院分区:
文献类型:
--
作者:
Todd,AaronR;Jarrold,MartinF
Charge detection mass spectrometry (CDMS) is emerging as a valuable tool to determine mass distributions for heterogeneous and high-mass samples. It is a single-particle technique where masses are determined for individual ions from simultaneous measurements of their mass-to-charge ratio (m/z) and charge. Ions are trapped in an electrostatic linear ion trap (ELIT) and oscillate back and forth through a detection cylinder. The trap is open and able to trap ions for a small fraction of the total measurement time so most of the ions (>99.8%) in a continuous ion beam are lost. Here, we implement an ion storage scheme where ions are accumulated and stored in a hexapole and then injected into the ELIT at the right time for them to be trapped. This pulsed mode of operation increases the sensitivity of CDMS by more than 2 orders of magnitude, which allows much lower titer samples to be analyzed. A limit of detection of 3.3 × 108particles/mL was obtained for hepatitis B virusT= 4 capsids with a 1.3 μL sample. The hexapole where the ions are accumulated and stored is a significant distance from the ion trap so ions are dispersed in time by theirm/zvalues as they travel between the hexapole and the ELIT. By varying the delay time between ion release and trapping, different windows ofm/zvalues can be trapped.
登录
查看更多内容
DOI:
--
发表时间:
1960
期刊:
影响因子:
--
作者:
H. Shelton;C. Hendricks;R. Wuerker
通讯作者:
R. Wuerker
影响因子:
7.4
作者:
John W. Smith;Elizabeth E Siegel;Joshua T. Maze;M. Jarrold
通讯作者:
M. Jarrold
影响因子:
2
作者:
Fuerstenau, SD;Benner, WH
通讯作者:
Benner, WH
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Z. Nie;Fenping Cui;M. Chu;Chung;Huan‐Cheng Chang;Yong Cai
通讯作者:
Yong Cai
影响因子:
3.2
作者:
David Z. Keifer;Andrew W. Alexander;M. Jarrold
通讯作者:
M. Jarrold