how does one convert frequencies to parts per million (ppm) example how many ppm is 10 hertz.?

Answer 1

ppm is as % only a number and a frequency is 1/time, a quantity.
They are not comparable nor convertible.
May you mean the conversion from Hz to MHz (M = mega = million)?
Then: 10 Hz = 1.0 x 10^-5 MHz

Th

Answer 2

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RE:
how does one convert frequencies to parts per million (ppm) example how many ppm is 10 hertz.?

Answer 3

Agree with Anthony except that it's spectroscopy rather than spectrometry (meaning that we use a form of radiation, as opposed to something like mass spectrometry where we don't). The thing with an NMR graph is that it is a plot of frequency, but unfortunately the absolute frequency of a resonance signal changes depending on the operating frequency of your spectrometer. To get around this, we standardise signals into values known as chemical shifts (ppm), which are independent of the operating frequency. The ppm units come about because we are dividing the frequency of a signal (in Hz) by that of the spectrometer (in MHz). The basic equation for determining a chemical shift is to subtract the frequency of the reference compound (which in C13 and proton NMR is TMS, which helpfully has a frequency of 0 Hz) from that of the signal, then dividing the result of that by the spectrometer operating frequency (remember, in MHz). For example, if we have a 400.13 MHz spectrometer, which is pretty typical, then a signal at 10 Hz corresponds to a chemical shift of 0.0249 ppm, which is a very upfield shift indeed!

The most useful application for this sort of thing is working out coupling constants (frequency gap between two peaks in a multiplet signal). This is particularly handy in pi-bonded systems (double bonds), where a coupling constant of 7-11 Hz corresponds to a cis isomer, whereas 12-18 Hz represents a trans isomer.

Answer 4

PPM usually applies to the concentration of a substance in a liquid. For example there can be 5 ppm of free chlorine in a swimming pool. Hertz is cycles per second and is generally applied to waves, wavelength, light or sound. When we think of hertz we may imply our computer who has a CPU of # MHz, or a radio station which broadcasts at a certain frequency etc. Parts per million is generally a chemical term while hertz is a physical term and as to my knowledge there is no convertion from one to the other or vice versa.

Answer 5

One hertz (Hz) means one cycle per second. A signal with a frequency of 500 Hz oscillates 500 times per second. PPM is (just like %) not a unit but rather a ratio: thus a 50 PPM error on a frequency measured as 500 Hz means that the error is (50/1,000,000)x500 Hz = 0,025 Hz. Of course 50 PPM of another measurement (e.g. 1000 Hz) will yield a different value, just like 50 % of 500 is not the same as 50 % of 1000.

Answer 6

You seem to be as confused as a blind lesbian in a fish market. PPM refers to the accuracy of a measurement or a standard.
For example, a frequency of 1 MHz (10^6 cycles per second) would be said to be accurate to 10 PPM if it was always between 999,990 and 1,000,010 cycles per second.
Expressed as a percentage, 1 PPM is .0001%.

I hope that helps.


Doug

Answer 7

First you have to know something about Frequency: I think possibly you could mean Pulses Per Minute instead of Parts Per Million. The answers that I have observed so far, don't seem to have grasped the situation.

There are only so many measurements that you can make regarding Frequency. Frequency was formerly
measured in Cycles/second. Not it is Hertz. 10 Hertz would be Ten complete cycles per second.
Frequency is = 1/ time:::::time is the period of any given waveform. The period for a 10 Hertz Signal would be .1 second.
Frequency is 1/time and conversely,
Time = 1/frequency.
If we were talking about 10 Hz, that means Ten cycles/second. In one minute there would be 60 times 10 or 600 cycles/minute.
The wavelength of any frequency is found by dividing that frequency into 300.000.000 meters. or simply dividing frequency into the speed of light gives the wavelength of that frequency. In Meters.
10 Hz would have a wavelength of 30 million Meters
If you have any further questions about frequency, you may write to me if your 360 membership is confirmed by Yahoo.

Answer 8

I assume that you are talking about Nuclear Magnetic Resonance Spectrometry.
Ppm can be converted to Hertz if you know the magnitude of the radio frequency you are using to generate your magnetic field. If your experiment is running at 500MHz, 10ppm would be 5000Hz. Based on the chemical shift, you can see the proton or carbon-13 isotope detected at different ppm based on your MHz used. It is dependent on your machine.

Answer 9

Ppm To Hz

Answer 10

ONLY way this question would make any sense is, if you are talking about FREQUENCY DRIFT.

Frequency drift is a variation in frequencies. If you have 5Mhz signal, and it drifts 10hz, then its stability is said to be 10ppm.

Or, perhaps you are talking about period? Period is 1/f. So if you have the 10 hertz signal, it's period is 0.1 second....

There aren't any conversion you can do to frequencies.