Abstract: The present invention relates to a method of processing or fractionating a sample comprising proteins, polypeptides and/or peptides, said method comprising (a) changing the physicochemical conditions of said sample; and (b) performing one or both of the following (i) and (ii): (i) adding solid particulate matter to said sample; and (ii) performing said method in a vessel with a rough surface; wherein steps (a) and (b) can be effected concomitantly or in any order; and wherein said processing or fractionating yields one or more first fractions of proteins, polypeptides and/or peptides as a precipitate on said particulate matter and/or said inhomogeneous surface, and a second fraction of proteins, polypeptides and/or peptides remaining in a supernatant.

Abstract: The present invention relates to a method of purifying peptides and/or polypeptides, said method comprising or consisting of: (a) loading a sample comprising peptides and/or polypeptides under acidic or neutral aqueous conditions on mixed-phase solid phase extraction (SPE) material, wherein said material consists of or comprises reversed phase/ion exchange material; (b) washing said mixed-phase SPE material with (ba) an acidic or neutral composition comprising at least 50% (v/v) organic solvent; and/or (bb) an acidic or neutral aqueous solution; and (c) eluting said peptides and/or polypeptides from said mixed-phase SPE material with an alkaline composition comprising at least 50% (v/v) organic solvent.

Abstract: The present invention relates to a method of purifying peptides and/or polypeptides, said method comprising or consisting of: (a) loading a sample comprising peptides and/or polypeptides under acidic or neutral aqueous conditions on mixed-phase solid phase extraction (SPE) material, wherein said material consists of or comprises reversed phase/ion exchange material; (b) washing said mixed-phase SPE material with (ba) an acidic or neutral composition comprising at least 50% (v/v) organic solvent; and/or (bb) an acidic or neutral aqueous solution; and (c) eluting said peptides and/or polypeptides from said mixed-phase SPE material with an alkaline composition comprising at least 50% (v/v) organic solvent.

Abstract: This invention relates to a method of dispersing magnetic particles, said method comprising or consisting of: (a) in a vessel, combining at least one permanent magnet and said magnetic particles in a liquid phase; and (b) triggering a fluctuating or oscillating motion of said permanent magnet using a magnetic field; thereby dispersing said particles.

Abstract: This invention provides a method of cleaving at least one covalent bond in at least one molecule, wherein said method comprises (a) colliding at least one magnetic body with said at least one molecule; and/or (b) triggering collision of at least one nonmagnetic particle with said at least one molecule by moving said at least one magnetic body.

Abstract: The present invention provides a method of preparing a sample for an analytic procedure, said sample comprising at least one protein, polypeptide or peptide molecule, and said method comprising fragmenting said molecule using at least one moving magnetic body.

Abstract: The present invention relates to a method of fractionating a variety of analytes bound to a matrix, said method comprising: (a) eluting said analytes with a plurality of eluents, wherein a first elution step is effected with an elution buffer comprising a first numbered eluent, and a subsequent (n-th) elution step is effected with an elution buffer comprising an n-th numbered eluent, wherein said n-th numbered eluent has a lower dipole moment and/or a higher hydrophobicity than said first numbered eluent.

Abstract: The present invention relates to a device comprising or consisting of: (a) a vessel; (b) a magnet inside said vessel; (c) means to trigger movement of said magnet with acoustic to ultrasonic frequency, preferably ultrasonic frequencies.

Abstract: The present invention relates to a cartridge comprising or consisting of, from top to bottom, the following elements: (a) an inlet; (b) a top volume; (c) at least one optional layer made of a first material; (d) adjacent to (b) or, if present, to (c), at least one layer of chromatographic material; (e) adjacent to (d) at least one layer made of first material; and (f) an outlet; wherein said first material is hydrophobic and porous.

Abstract: The present invention relates to a use of a tertiary amine as buffer in sample preparation, preferably for mass spectrometry and/or UV/vis spectroscopy, wherein the sample comprises proteins, polypeptides and/or peptides, and said sample preparation comprises: (a) protein, polypeptide and peptide denaturation; and (b) chemical isotope labelling and/or chemical cross-linking, wherein said sample preparation does not use primary amine buffers.

Abstract: The present invention relates to a method of purifying peptides and/or polypeptides, said method comprising or consisting of: (a) loading a sample comprising peptides and/or polypeptides under acidic or neutral aqueous conditions on mixed-phase solid phase extraction (SPE) material, wherein said material consists of or comprises reversed phase/ion exchange material; (b) washing said mixed-phase SPE material with (ba) an acidic or neutral composition comprising at least 50% (v/v) organic solvent; and/or (bb) an acidic or neutral aqueous solution; and (c) eluting said peptides and/or polypeptides from said mixed-phase SPE material with an alkaline composition comprising at least 50% (v/v) organic solvent.

Abstract: The present invention relates to sample preparation container for purification and/or enrichment of bio-organic compounds from cellular material, viruses and/or sub-components of said cellular material and/or viruses, the container comprising a reaction chamber and a chromatography medium; wherein said reaction chamber is for holding said cellular material, viruses and/or sub-components of said cellular material and/or viruses and is configured such that at least one of the following reactions can be performed therein: lysis, e.g.

Abstract: The present invention relates to a device for preventing band broadening and remixing of separated fractions, and associated method, comprising a chromatographic column coupled to a flow selector, such as a rotary valve, wherein said flow selector is connected to the distal end of said column such that the sum of post-column swept volume and post-column dead volume is less than 10 ?L. Preferably, the column is directly plugged into the inlet port of the rotary valve and the sample is fractionated at the outlet port.

Abstract: Disclosed is a sample preparation container for purification and/or enrichment of bio-organic compounds from cellular material, viruses and/or sub-components of these. The container includes a reaction chamber and a chromatography medium. The reaction chamber is for holding the cellular material, etc. and is configured to perform reactions inside. The chromatography medium is configured to purify the bio-organic compounds. The chromatography medium is located at a wall of the reaction chamber, and the wall is closed or sealed and configured to be opened for obtaining purified bio-organic compounds. The sample preparation container further includes a receiving chamber for receiving the bio-organic compounds, that is adjacent to the chromatography medium such that the chromatography medium separates the reaction chamber from the receiving chamber. The outer face of the receiving chamber is closed and configured to be opened for obtaining purified bio-organic compounds.

Abstract: The present invention relates to a method of monitoring performance of a liquid chromatography-mass spectrometry (LC-MS) system, comprising the steps of: (a) performing LC with a first buffer, said first buffer comprising a defined concentration of a first compound, said performing comprising a step of eluting; (b) subjecting the eluate of said LC to electro-spray ionization; and (c) determining the amount of said first compound in said eluate by means of MS, thereby monitoring said performance; wherein said first compound (i) has either no affinity or negligible affinity to the chromatographic matrix; and (ii) is detectable by MS.

Abstract: The present invention relates to sample preparation container for purification and/or enrichment of bio-organic compounds from cellular material, viruses and/or sub-components of said cellular material and/or viruses, the container comprising a reaction chamber and a chromatography medium; wherein said reaction chamber is for holding said cellular material, viruses and/or sub-components of said cellular material and/or viruses and is configured such that at least one of the following reactions can be performed therein: lyis, e.g.