public void TestPPMConversion(double massToConvert, double currentMz, double expectedPPM)
{
var convertedPPM = PeptideMassCalculator.MassToPPM(massToConvert, currentMz);
var reconvertedMass = PeptideMassCalculator.PPMToMass(convertedPPM, currentMz);
Console.WriteLine("DelM of {0} Da converts to {1:F5} ppm at {2:F5} m/z ", massToConvert, convertedPPM, currentMz);
Assert.AreEqual(expectedPPM, convertedPPM, 0.0001, "PPM Conversion error");
Assert.AreEqual(massToConvert, reconvertedMass, 1E-05, "Da to PPM to Da round trip error");
}