prm-converter

A converter for DataApex chromatography files

Usage

parseRawData returns one chromatogram per detector. The time between two scans is derived from the acquisition rate stored in the file, so retention times are correct whatever the rate the run was acquired at.

import { readFileSync } from 'node:fs';

import { parseRawData } from 'prm-converter';

const chromatograms = parseRawData(readFileSync('sample.prm'));

for (const { detectorName, timeStep, scans } of chromatograms) {
  // "GC0 - Front Signal", 50 ms between two scans
  console.log(detectorName, timeStep);
  console.log(scans[0].retentionTime, scans[0].totalSignal);
}

completeParse returns the whole file: the metadata tree and the detector signals as Float32Arrays.

import { completeParse } from 'prm-converter';

const parsed = completeParse(readFileSync('sample.prm'));

console.log(parsed.Root.Data.Detector1.DetName);
console.log(parsed.Root.Data.Detector1.PRMData);

Both functions accept a logger reporting the bytes they could not interpret. It follows the Logger interface of cheminfo-types, so any pino-like logger fits.

import { FifoLogger } from 'fifo-logger';

const logger = new FifoLogger();
const parsed = completeParse(readFileSync('sample.prm'), { logger });

console.log(logger.getLogs());