The LC Peak Width vs Scan Speed Checker is a scientifically rigorous acquisition planning tool designed for LC-MS method development, optimization, and troubleshooting. This calculator determines whether your sampling rate provides sufficient points-per-peak (PPP) to accurately define chromatographic peaks and ensure reliable quantitation.

In liquid chromatography–mass spectrometry, insufficient sampling density can lead to distorted peak shapes, inaccurate integration, poor reproducibility, and compromised quantitative performance. This simulator allows you to directly evaluate whether your acquisition timing is adequate before running a method.

What This Tool Calculates

Using user-defined inputs such as:

Peak width at half height (seconds)

Optional peak width at base

Scan time (full-scan mode)

Dwell time and number of transitions (targeted mode)

Cycle overhead and settle time

the calculator computes:

Sampling interval (Δt)

Acquisition rate (Hz)

Points-per-peak at half height (PPP_half)

Optional PPP at base

Maximum allowable cycle time for a chosen PPP target

PASS / FAIL evaluation against user-selected PPP thresholds

The model is transparent and mathematically explicit:

PPP = Peak Width / Sampling Interval
Δt = Scan Time + Overhead
or
Δt = Overhead + N × (Dwell + Settle)

No hidden assumptions. No vendor-specific parameters. All results derive strictly from your inputs.

Why Points-Per-Peak Matters in LC-MS

Proper sampling density is essential for:

Accurate quantitative integration

Reliable peak area determination

Robust MRM transition scheduling

High-throughput UHPLC methods

Narrow peak workflows in fast chromatography

Avoiding undersampling in high-transition methods

As chromatographic peaks become narrower—especially in UHPLC—cycle time must decrease proportionally to maintain sufficient PPP. This tool helps you balance dwell time, number of transitions, and cycle overhead to avoid undersampling.

Ideal For

LC-MS method development

MRM dwell time optimization

Full-scan acquisition planning

Scheduled transition evaluation

UHPLC peak sampling validation

Teaching chromatographic data acquisition principles

This LC-MS scan speed calculator provides a clear, physics-based evaluation of sampling adequacy without making assumptions about instrument brand or hardware limits.