A biomarker panel for discriminating lung cancer comprises the biomarkers valine, lysoPhosphatidylcholine acyl C18:2 (Lyso PC a18:2), decadienyl-L-carnitine (C10:2) phosphatidylcholine, acyl-alkyl C36:0 (PC aa C36:0), phosphatidylcholine diacyl C30:2 (PC aa C30:2), spermine, and diacetylspermine.

Calibration standards with known amounts of combinatorial biomolecules, such as GLs, are provided. In some aspects, calibration markers of the embodiments can be used to assess or quantitate the levels of a plurality of biomolecules in a test sample, such as by mass spectrometry.

Methods and compositions for the manufacture and use of a detection apparatus based on one or more native biological nanopores are provided. Uses include, but are not limited to, detection and sequencing of nucleic acids.

A method of analysis using mass spectrometry and/or ion mobility spectrometry is disclosed comprising: (a) using a first device to generate smoke, aerosol or vapour from a target in vitro or ex vivo cell population; (b) mass analysing and/or ion mobility analysing said smoke, aerosol or vapour, or ions derived therefrom, in order to obtain spectrometric data; and (c) analysing said spectrometric data in order to identify and/or characterise said target cell population or one or more cells and/or compounds present in said target cell population.

A method of analysis using mass spectrometry and/or ion mobility spectrometry is disclosed. The method comprises: using a first device to generate smoke, aerosol or vapour from a target comprising or consisting of a microbial population; mass analysing and/or ion mobility analysing said smoke, aerosol or vapour, or ions derived therefrom, in order to obtain spectrometric data; and analysing said spectrometric data in order to analyse said microbial population.

A method of analysis using mass and/or ion mobility spectrometry or ion mobility spectrometry is disclosed comprising: using a first device to generate aerosol, smoke or vapour from one or more regions of a first target of biological material; and mass and/or ion mobility analysing and/or ion mobility analysing said aerosol, smoke, or vapour, or ions derived therefrom so as to obtain first spectrometric data. The method may use an ambient ionisation method.

The invention relates to a biochemical diagnostic test performed on peripheral blood, which allows the diagnosis of Attention Deficit Hyperactivity Disorder (ADHD). Specifically, the serum levels of at least 6 markers corresponding to 2 groups of functional lipids, esfingolipids and long-chain polyunsaturated fatty acids (LC-PUFAs) are measured, specifically: Ceramide C16:0, Ceramide C24:0, Deoxy dihydro-ceramide C24:1 and Sphinganin 1-phosphate, docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), detecting a variation in concentrations with respect to the values for the control population.

A method of analysis using mass spectrometry and/or ion mobility spectrometry is disclosed. The method comprises: using a first device to generate smoke, aerosol or vapour from a target comprising or consisting of a microbial population; mass analysing and/or ion mobility analysing said smoke, aerosol or vapour, or ions derived therefrom, in order to obtain spectrometric data; and analysing said spectrometric data in order to analyse said microbial population.

A method of mass spectrometry or ion mobility spectrometry is disclosed comprising: providing an analyte; supplying a matrix compound to said analyte such that said analyte dissolves in said matrix; forming first droplets of the dissolved analyte; and colliding said first droplets with a collision surface. The use of matrix improves the analyte ion signal.

Phosphatidylalkanol homologues having isotopically labelled moieties, methods for preparation of isotopically labelled phosphatidylalkanol homologues and uses of isotopically labelled phosphatidylalkanol homologues.