Lg Chem, Ltd

Hye Sung Cho

Young Hee Lim

Yeu Young Youn

Byoung Hyoun Kim

Su Youn Han

Hee Yong Park

Yeon Hwa Lee

Hyuk Joo Kim

Dong Hyun Kim

Sangwoo Lee

Tae Geun Noh

Doyoung Kim

Seong Ho Choi

Jong Chan Kim

Jin Sook Ryu

Yongjin Bae

Minkyu Min

Mi Ra Hong

Youngcheol Choi

Hye Mi Kim

Yu Ra Lee

Seung Yup Lee

Sooyoung Kwak

Kyunga Sung

Soo Young Kwak

A method for analyzing the structure of an insoluble pigment compound is disclosed. In some embodiments, a method comprise determining a molecular weight of the pigment compound, the insoluble pigment compound by ultrasonic treatment in a solvent to form partial structural compounds, analyzing the elemental composition and the structure of partial structural compounds by liquid chromatography/mass spectrometry and nuclear magnetic resonance, respectively and determining the structure of the insoluble pigment compound from the analysis of the partial structural compounds and the molecular weight of the insoluble pigment compound. In some embodiments, a method comprises determining molecular weight of the pigment compound using matrix assisted laser desorption ionization-time of flight mass spectrometry, selecting a parent mass, fragmenting the parent mass and determining the molecular weight of each fragment, and determining the structure of the insoluble pigment compound from the molecular weight of the insoluble pigment compound and that of the fragments.

Method for qualitatively analyzing insoluble pigment compound

A pretreatment method for analyzing dioxin compounds and an analytical method using the same, in which a column packed with polymer beads that are capable of selectively adsorbing dioxin compounds is used in a purification step during pretreatment, thereby remarkably reducing a time required for pretreatment and improving a recovery rate of an internal standard for purification, are provided.

Pretreatment method for analyzing dioxin compounds and analytical method using the same

The present invention provides a method enabling a quantitative analysis of a polymer by MALDI mass spectrometry, and a method for manufacturing a sample for MALDI mass spectrometry for a quantitative analysis of a polymer. To that end, the methods can increase reproducibility of a MALDI spectrum by making uniform the thickness of a sample affecting the pattern in a polymer MALDI spectrum. The sample according to the present invention is applicable also to a commercial MALDI-TOF instrument, and, thus, can quantitatively analyze a polymer in a more efficient and faster manner.

Method for quantitative analysis of polymer using MALDI mass spectrometry, and method for manufacturing sample for MALDI mass spectrometry for quantitative analysis of polymer

The present invention relates to an apparatus for measuring moisture of a solid sample, a method for measuring a moisture content of the solid sample, and a method for analyzing an imidization rate, and more particularly, to an apparatus for measuring moisture of a solid sample, a method for measuring a moisture content of the solid sample, and a method for analyzing an imidization rate, which detect the moisture content of the solid sample at a specific temperature by using a Karl-Fischer device capable of selectively detecting only the moisture content of the solid sample in the method for analyzing an imidization rate of the solid sample and calculate the imidization rate of the solid sample by using the detected moisture content.

Apparatus for measuring moisture of solid sample, method for measuring moisture content of solid sample, and method for analyzing imidization ratio

The present invention provides a method for quantitative analysis of a compound in a sample characterized in that the quantitative analysis is performed by a method of using an external standard which obtains NMR spectra of a sample and a standard substance and then compares them, and it can be applied even to an insoluble sample.

Method for quantitative analysis

The present invention relates to a method for analyzing the length of sulfur crosslinking bonds in a vulcanized rubber using NMR spectrum. In some embodiments, the method comprises obtaining, independently, a carbon-13 nuclear magnetic resonance (C NMR) spectrum of a standard substance, wherein the standard substance containing carbon atoms, and aC NMR spectrum of the vulcanized rubber, wherein theC NMR spectrum of the standard substance and theC NMR spectrum of the vulcanized rubber are obtained under the same conditions; obtaining, independently, free induction decay (FID) amplification values of characteristic peaks in theC NMR spectrum of the standard substance, and FID amplification values of characteristic peaks in theC NMR spectrum of the vulcanized rubber; and measuring the length of sulfur crosslinking bonds in the vulcanized rubber.

Method for analyzing the length of sulfur crosslinking bonds in a vulcanized rubber

Provided are a polymer electrolyte composition, an electrolyte membrane, a membrane electrolyte assembly, and a fuel cell. The polymer electrolyte composition according to an exemplary embodiment of this application includes a first solvent, a second solvent which is different from the first solvent, and a polymer which is reacted with the first solvent and the second solvent, in which the polymer includes a functional group which reacts with the first solvent by a first reaction energy and with the second solvent by a second reaction energy, and the second reaction energy is smaller than the first reaction energy.

Polymer electrolyte composition, electrolyte membrane, membrane-electrode assembly and fuel cell

The present disclosure relates to an apparatus and a method for analyzing side chains of a polymer. More specifically, the present disclosure relates to an apparatus and a method for analyzing the number of side chains of a polymer.

Polymer side chain analysis method and polymer side chain analysis device

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Daejeon, South Korea

Hye Sung Cho