Correcting Isobaric Peptide Mass Shifts in Proteomic Fiber Quantification
Correcting isobaric peptide mass shifts in proteomic fibre testing prevents false wool detections and protects cashmere customs declarations from penalties.
Orbitrap Mass Spectrometry
Trapping Physics
High performance analysis utilizing orbital trapping of ions to achieve extreme mass accuracy represents a standard in molecular weighing. Orbitrap mass spectrometry operates by injecting ions into an electrostatic field around a spindle-shaped electrode. The frequency of the axial oscillations is measured and converted into a mass spectrum via Fourier transform.
This process avoids the need for magnetic sectors or radio frequency quadrupoles.
Additive Screening
Finishing chemicals such as softeners and biocides are often present in very low concentrations on the fabric surface. By using orbitrap mass spectrometry, a laboratory can screen for hundreds of these compounds simultaneously. High resolving power ensures that the target molecule is not confused with the fabric background.
Dye Speciation
Identification of specific dye molecules in a complex mixture allows for the forensic analysis of textile samples. When researchers apply orbitrap mass spectrometry to an extract, they can determine the exact manufacturer or batch of the dye. This precision is used to investigate contamination in the mill water supply.
Measurement Reliability
Consistency in the data produced ensures that regulatory claims are based on hard evidence. The stability of the mass calibration in orbitrap mass spectrometry reduces the frequency of errors in high throughput testing. It provides a definitive record for compliance with restricted substance lists.