Multi-peak quantification method based on photoionization ion mobility spectrometry
A technology of ion mobility spectrometry and ionization, applied in the field of multi-peak quantification based on photoionization ion mobility spectrometry, can solve problems such as inapplicability, limitation of ion mobility spectrometry application scenarios, complex ionization reactions, etc., to expand the scope of application and shorten the data The effect of long analysis time and broad application prospects
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Embodiment 1
[0035] According to the above conditions, blank blood was injected and determined by ion mobility spectrometry. figure 1 is the reagent ion O 2 - The tracking trend line of the peak thermal analysis signal can easily get the O during a single analysis. 2 - Maximum signal strength (I m ) and the integral value within 0~60s.
Embodiment 2
[0037] According to the above conditions, the concentration of propofol was 5 ng μL -1 The blood samples were injected and determined by ion mobility spectrometry. figure 2 Propofol product ion M·O 2 - tracking trend line. Integrate the curve within the range of 0-60s, and subtract the integral value corresponding to the blank blood injection from the obtained integral value to obtain a concentration of 5 ngμL -1 The corresponding integral area of the sample.
Embodiment 3
[0039] According to the above conditions, take the prepared 1, 2.5, 5, 7.5, 10, 12.5ngμL -1 of blood samples, determined by ion mobility spectrometry. The signals of the two product ion peaks of propofol were tracked simultaneously, and the integrated areas of the two peaks at each concentration were calculated separately. The integral area at each concentration is compared, and the ratio is plotted against the concentration of propofol, as image 3 shown. It can be seen that the integrated areas of the two product ion peaks of propofol do not fluctuate with the concentration, that is, propofol will undergo ion-molecule reactions R3 and R4 in the ion mobility spectrum of negative ion mode, and the generated [M-H] - and M·O 2 - The ratio of the number of ions is fixed.
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