Pushing the Resolving Power of Tyndall–Powell Gate Ion Mobility Spectrometry over 100 with No Sensitivity Loss for Multiple Ion Species

Ion gate is a key buildup for drift tube ion mobility spectrometry (IMS) and its combination with mass spectrometry. Bradbury–Nielsen gate, as the most commonly used ion gate in IMS, possesses a distinct ion mobility discrimination effect due to its depletion features. This impedes the scaling of the ion gate opening time to improve the separation capability of IMS while keeping its sensitivity for multiple ion species. In this work, a Tyndall–Powell gate (TPG) simply composed of two identical wire grids was used to develop an ion gate with nearly no ion mobility discrimination for IMS. Experimental results showed that the TPG features a gate region where the electric field for opening the gate could be enhanced to effectively solve the ion mobility discrimination problem related to it. Meanwhile, enhancing that electric field enabled the TPG-IMS to keep a resolving power over 106 at 100 °C for ion peak with a signal-to-noise ratio up to 800. With that TPG-IMS, baseline separation of two ion peaks, the hydronium and the acetone monomer peaks with a reduced mobility difference of only 0.04 cm² V^–1 s^–1, was achieved with no sensitivity loss for the least mobile acetone dimer ions

La lucha por los comunes y las alternativas al desarrollo frente al extractivismo : miradas desde las ecología(s) política(s) latinoamericanas

Este libro aporta nuevos elementos a los urgentes y necesarios cuestionamientos colectivos, teniendo en cuenta los nuevos paradigmas teóricos y políticos de la transformación social en América Latina en un diálogo entre experiencias de construcción de lo común. Las alternativas al desarrollo, nuestro gran desafío desde la ecología política latinoamericana, implica profundizar estas luchas por la producción de lo común hacia una transformación social que debe abordarse simultáneamente en sus complejas relaciones existentes entre capital, clase, raza, colonialidad, género y naturaleza, ya que son precisamente sus tejidos, enredos e interdependencias históricas los que configuran las bases civilizatorias del sistema que enfrentamos. Del Prólogo