Lg Chem, Ltd

Kyoungjoo Jin

Yeu Young Youn

Young Hee Lim

Yongjin Bae

Byoung Hyoun Kim

Su Youn Han

Jun Won Choi

Dae Hun Kim

Seonyoung Jegal

Junwon Choi

A method for relative quantitative analysis of a polymer using MALDI mass spectrometry, the method comprising the steps of preparing a plurality of polymer specimens having a thickness variation of 30% or less by electrospraying a solution including a polymer sample, a monomeric internal standard material, and a matrix through a mask for each different concentration of the polymer sample; obtaining MALDI mass spectra by irradiating laser beams to each of the plurality of polymer specimens, and calculating a signal intensity ratio of the polymer sample to the small molecule internal standard from peak results of the spectra; and depicting the calculated signal intensity ratio according to the concentration of the polymer sample to prepare a quantitative calibration curve, and the method capable of providing MALDI mass spectra with reduced overlapping peaks and thereby providing the relative quantitative analysis of a polymer with improved accuracy.

Method for relative quantitative analysis of polymer using MALDI mass spectrometry

The present invention provides a method for relative quantitative analysis of a polymer using MALDI mass spectrometry, the method comprising the steps of: (S1) electro-spraying a solution containing a polymer sample and a matrix through a mask to prepare a plurality of polymer specimens with a thickness variation of 30% or less according to the concentration of the polymer sample; (S2) irradiating the respective plurality of polymer specimens with laser to obtain MALDI mass spectra; and (S3) creating a quantitative calibration curve from peak results of the MALDI mass spectra by using a signal of the polymer sample.

The present invention relates to a micro device for solid phase extraction and more particularly provides a micro device which is configured to perform solid phase extraction by injecting a filler and a solvent and producing a uniform flow of the solvent.

Micro device for solid phase extraction

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Daejeon, South Korea

Kyoungjoo Jin