Irina Oshchepkova
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Articles
Recent activity by Irina Oshchepkova-
Spectrus: Using retention time and MS/MS to confirm identity vs reference in xC/UV/MS data
DescriptionComponent identification is often based on comparing both retention time and MS/MS spectra to a reference standard. Spectrus can store and compare both for confident identification.Solut...
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Spectrus: Using background subtraction to enhance low‑level components in LC/MS data
DescriptionHigh chemical background or matrix signals can mask low‑abundance analytes. Spectrus allows background subtraction to enhance visibility of weak components.SolutionAcquire an appropriate...
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Spectrus: Handling saturated peaks and UV/MS detector overload
DescriptionUV and MS detectors can saturate when analyte concentration is too high. Saturated peaks may appear flattened or clipped and yield unreliable area measurements. Spectrus can highlight su...
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Spectrus: Saving and reusing processing methods (integration, peak picking) for xC/UV/MS data
DescriptionConsistent processing of xC/UV/MS batches requires standardized methods for peak picking, integration, and noise handling. Spectrus can save these settings as methods that can be applied...
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Spectrus: Creating calibration curves for quantitative UV/Vis analysis
DescriptionQuantitative UV/Vis spectroscopy relies on calibration curves relating absorbance to concentration. Spectrus can process multiple standards and generate these curves using the Optical Wo...
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Spectrus: Subtracting background or solvent in IR spectra
DescriptionIR spectra often contain background or solvent contributions. If a separate background or solvent spectrum is available, subtracting it can clarify analyte bands.SolutionImport the sampl...
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Spectrus: Evaluating isotope patterns to support molecular formula assignment in xC/UV/MS data
DescriptionIsotope patterns in MS spectra (e.g., for Cl, Br, S) help confirm proposed molecular formulas. Spectrus supports viewing and comparing theoretical and experimental isotope patterns.Solut...
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Spectrus: Using blank runs to identify background and contaminants in xC/UV/MS data
DescriptionxC/UV/MS term includes LC/UV/MS and GC/MSBlank runs (no analyte injected) help identify system background peaks and contaminants. Comparing blanks with sample runs in Spectrus can preven...
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Spectrus: Differences in peak areas between TIC and Individual Ion Traces
DescriptionIn xC/UV/MS data, the total ion chromatogram (TIC) and extracted ion chromatograms (XICs) are based on different signal definitions:TIC integrates intensity over all m/z values at each t...
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Spectrus: Baseline correction and noise reduction in UV/Vis spectra
DescriptionRaw UV/Vis spectra can contain baseline offsets, slopes, and noise that interfere with peak interpretation. Spectrus provides tools for baseline correction and smoothing to improve data ...