Frequently Asked Questions (FAQs)

A: High-resolution mass spectrometry (HRMS) has a higher resolving power, which allows it to distinguish between ions with similar mass-to-charge ratios. Low-resolution mass spectrometry (LRMS) has a lower resolving power, which means it can't distinguish between ions with similar mass-to-charge ratios.

A: The rapid evolution of proteomics is due in large part to many improvements in mass spectrometry that have occurred during the past several years. Mass spectrometry plays a vital role in proteomics, which can provide information about protein identity, chemical modification and structure.

A: Mass spectrometry is used in metabolomics to identify and quantify small molecules, such as metabolites, lipids, and sugars, in biological samples. It is also used to study metabolic pathways, identify biomarkers, and understand disease mechanisms.

A: Mass spectrometry is used in environmental analysis to identify and quantify contaminants such as pesticides, dioxins and polychlorinated Biphenyls (PCBs) in air, water and soil samples.

A: In NMR spectroscopy, the chemical shift is the resonant frequency of an atomic nucleus in a magnetic field with relative to a standard. It depends on the type of nucleus and the electron motion of nearby atoms and molecules.

A: The main difference between ¹H NMR and ¹³C NMR is that ¹H NMR is used to determine the type and number of hydrogen atoms present in a molecule, while ¹³C NMR is used to determine the type and number of carbon atoms in a molecule. ¹H NMR usually has a slow process, while ¹³C NMR works faster. The chemical shift range for ¹H NMR and ¹³C NMR is 0-14 ppm and 0-240 ppm respectively.

A: NMR is an important tool in structural biology. It can be used as the preferred method to study the structure and dynamics of biological molecules in solution.

A: NMR is used in drug discovery to reveal the molecular structure of the biomolecules, elucidate and verify the structure of drugs, and provide structural information on the interaction between biomolecules (targets) and small molecule compounds (ligands).

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