High resolution mass spectrometry imaging using 3 micron laser ablation

High resolution mass spectrometry imaging using 3 micron laser ablation
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使用 3 微米激光烧蚀进行高分辨率质谱成像

DOI:
10.1117/12.2649191
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发表时间:
2023
期刊:
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影响因子:
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通讯作者:
Battle R
Battle R
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作者:
Battle R

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我们报道了一个单细胞级分辨率(≤10µm),激光解吸为基础的质谱成像平台。使用光学参量放大器产生约3µm的约100 ps、200 nJ脉冲,最大重复率为500 kHz。脉冲紧密聚焦在厚度为10 μ m的新鲜冷冻动物组织样品上。小体积的组织很容易被激光烧蚀,随后使用安装在飞行时间质量分析仪上的快速蒸发电离质谱(REIMS)源进行化学分析。通过激光聚焦对样品进行光栅扫描,可以获得质谱数据,这些数据可以处理成像素尺寸为10µm的图像,而无需过采样,对应于细胞水平的分辨率。
We report a single-cell level resolution (≤10 µm), laser desorption-based mass spectrometry imaging platform. An optical parametric amplifier is used to generate ∼100 ps, 200 nJ pulses at around 3 µm with a maximum repetition rate of 500 kHz. The pulses are tightly focussed on to fresh frozen animal tissue samples with a thickness of 10 µm. Small volumes of tissue are readily ablated by the laser and are subsequently chemically analyzed using a Rapid Evaporative Ionization Mass Spectrometry (REIMS) source installed on a time of flight mass analyzer. Raster scanning the samples through the laser focus enables the acquisition of mass spectrometry data which can be processed into images with pixel size 10 µm without oversampling, corresponding to cellular level resolution.
DOI: 10.1021/acs.analchem.9b01441
发表时间: 2019-08-06
影响因子: 7.4
作者:
Jones, Emrys A.;Simon, Daniel;Takats, Zoltan
通讯作者: Takats, Zoltan
DOI: 10.1021/acs.analchem.7b04733
发表时间: 2018-01-02
影响因子: 7.4
作者:
Buchberger AR;DeLaney K;Johnson J;Li L
通讯作者: Li L