Larmor frequency
ω₀ = −γB₀ν₀ = |γ|B₀/(2π)Decode and Fourier-transform Magritek Spinsolve 1D proton and carbon NMR acquisitions without uploading experimental data to a server.
Magritek Spinsolve
Frequency spectrum
Hover over the spectrum to inspect precise shift and intensity values.
Calibration
Select Set solvent, then click the residual solvent peak. The entire ppm axis will shift by the required offset.
Integration
Select Integrate and drag around a signal.
Coupling
Select Measure J and click two peak maxima. Every completed pair is retained and restored locally when you reopen this acquisition.
Assignments
| Signal | Chemical shift | Splitting | Integration | Coupling |
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Splitting labels are editable. Integrals and J values appear when the corresponding 1D analysis regions or peak pair have been selected.
Larmor frequency
ω₀ = −γB₀ν₀ = |γ|B₀/(2π)Chemical shift
δ = (ν − νref)/ν₀ × 10⁶δ is reported in ppm and is field-independent.Time-domain signal
s(t) = Σ Aₖe⁻ᵗ⁄ᵀ²*ₖeⁱ⁽²πνₖt+φₖ⁾The measured FID is a sum of damped complex sinusoids.Fourier transform
S(ν) = ∫ s(t)e⁻ⁱ²πνᵗ dtConverts the FID from time to frequency domain.Exponential apodization
sLB(t) = s(t)e⁻π·LB·tLB broadens lines while improving apparent signal-to-noise.Zero-order phase
Sφ(ν) = S(ν)eⁱφ⁰The same phase rotation is applied across the spectrum.Solvent referencing
δcorrected = δmeasured + (δknown − δsolvent)Aligns the selected residual-solvent peak to its accepted shift.Signal integration
I = ∫ S(δ)dδ ∝ NFor quantitative ¹H NMR, area is proportional to contributing nuclei under suitable acquisition conditions.Scalar coupling
J = |δ₁ − δ₂|ν₀Δδ in ppm multiplied by observation frequency in MHz gives J in Hz.Digital resolution
Δν = SW/NFFTZero filling decreases plotted point spacing but does not create new physical resolution.Relaxation linewidth
Δν½ ≈ 1/(πT₂*)Shorter effective transverse relaxation produces broader resonances.Signal-to-noise
SNR ∝ √NscansDoubling SNR ideally requires four times as many scans.COSY correlation
Icross ∝ sin(πJHHτ)Off-diagonal peaks connect scalar-coupled proton environments.HSQC transfer
τ ≈ 1/(4·¹JCH)Coherence transfer correlates each observed proton with its directly bonded carbon.In routine broadband-decoupled ¹³C spectra, carbon–proton splittings are intentionally collapsed and peak areas are generally not directly quantitative; integration and J tools are therefore hidden in ¹³C mode.
Negative phased 1D intensities are clipped at the baseline for display and integration. The reader targets Magritek Spinsolve data.1d and data.2d files with the SORPATAD1.1V signature. COSY and g-HSQC matrices are transformed in both dimensions and displayed as normalized magnitude contours. All processing and assignments remain local to the browser.