Desorption electrospray ionization–mass spectrometric analysis of low vapor pressure chemical particulates collected from a surface

由 ty10086 提交于 周四, 08/26/2021 - 13:32
文章英文标题
Desorption electrospray ionization–mass spectrometric analysis of low vapor pressure chemical particulates collected from a surface
正文
Abstract(#br)The collection of a low vapor pressure chemical simulant triethyl phosphate sorbed onto silica gel (TEP/SG) from a surface with subsequent analysis of the TEP/SG particulates using desorption electrospray ionization–mass spectrometry (DESI–MS) is described. Collection of TEP/SG particulates on a surface was accomplished using a sticky screen sampler composed of a stainless steel screen coated with partially polymerized polydimethylsiloxane (PDMS). DESI–MS analysis of TEP/SG particulates containing different percentages of TEP sorbed onto silica gel enabled the generation of response curves for the TEP ions m / z 155 and m / z 127. Using the response curves the calculation of the mass of TEP in a 25\u003cce:hsp sp=\"0.25\"/\u003ewt% sample of TEP/SG was calculated, results show that the calculated mass of TEP was 14% different from the actual mass of TEP in the sample using the m / z 127 TEP ion response curve. Detection limits for the TEP vapor and TEP/SG particulates were calculated to be 4\u003cce:hsp sp=\"0.25\"/\u003eμg and 6 particles, respectively.
文章内容（英文）
Abstract(#br)The collection of a low vapor pressure chemical simulant triethyl phosphate sorbed onto silica gel (TEP/SG) from a surface with subsequent analysis of the TEP/SG particulates using desorption electrospray ionization–mass spectrometry (DESI–MS) is described. Collection of TEP/SG particulates on a surface was accomplished using a sticky screen sampler composed of a stainless steel screen coated with partially polymerized polydimethylsiloxane (PDMS). DESI–MS analysis of TEP/SG particulates containing different percentages of TEP sorbed onto silica gel enabled the generation of response curves for the TEP ions m / z 155 and m / z 127. Using the response curves the calculation of the mass of TEP in a 25\u003cce:hsp sp=\"0.25\"/\u003ewt% sample of TEP/SG was calculated, results show that the calculated mass of TEP was 14% different from the actual mass of TEP in the sample using the m / z 127 TEP ion response curve. Detection limits for the TEP vapor and TEP/SG particulates were calculated to be 4\u003cce:hsp sp=\"0.25\"/\u003eμg and 6 particles, respectively.
来源出处
Journal|[J]Analytica Chimica ActaVolume 853, 2015. PP 368-374
DOI
https://doi.org/10.1016/j.aca.2014.09.042

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此链接为PDMS-微流控芯片/PDMS/道康宁SYLGARD184/小桶0.5KG装的链接。

一般性的产品性能参数表参考以下小桶装的参数：

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品牌型号：道康宁SYLGARD184

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产品颜色：保质期限：36个月

存放环境说明：室温,阴凉处保存

备注说明：

美国道康宁道康宁SYLGARD 184硅橡胶是由液体组分组成的双组分套件产品，包括基本组分与固化剂。基本组分与固化剂按10:1重量比完全混合，中等粘度混合液的稠度与SAE 40机油相似。无论厚薄，混合液将固化成为具有韧性的透明弹性体，最适用于电子／电气方面的封装与灌封应用。 道康宁SYLGARD 184硅橡胶在25~150℃的温度范围内固化，无放热现象，无需二次固化。固化过程完成后，可立即在-55~200℃的温度范围内使用。 产品特性：低毒性，在常规的工业操作中，无特别的注意事项； 无溶剂或固化副产物， 固化时不放热；无需特殊的通风条件，不会产生腐蚀；固化时，收缩量小； 固化后， 透明具有弹性；抗震与减缓机械震动；振动的传递性能小；元件可裸视检查与易修补性； 环保性能；低吸水性，良好的耐辐射性能；高真空状态下的低漏气性； 优异的电性能；较大温度范围内的稳定性， 抗解聚；在-55~200℃范围内，甚至在密闭状态下保持弹性与柔韧性，性能稳定； 阻燃性，UL可燃性分级为94 V-1，温度等级：130℃ 产品用途： 道康宁SYLGARD 184硅橡胶在电气／电子的封装与灌封方面有广泛的应用。