Lg Chem, Ltd

Lg Energy Solution, Ltd.

Lucky Limited

Young Hee Lim

Yeu Young Youn

Yongjin Bae

Hye Sung Cho

Sooyoung Kwak

Hyun Sik You

Yu Ra Lee

Eunhee Kim

Kyoungjoo Jin

Yeon Hwa Lee

Jin Young Park

Ji Won Park

Won Jong Kwon

Byoung Hyoun Kim

Ki Seok Jang

Su Youn Han

Jeong Soo Kim

Jong Chan Kim

Byung Hyun Park

Jin H Cho

Sang Ho Kim

Hong Woo Kim

Mi Ra Hong

Shin Jung Choi

Jae S Rim

Su M Hong

Chang U Hur

Sang H Chae

Joo Eun Jung

Eunbyeol Ko

Bomee Jang

Eunyeong Jin

So Yi Chung

The present invention relates to a high-temperature-gas collection apparatus and method, and the objective of the present invention is to provide a high-temperature-gas collection apparatus and method, which stably collect high-temperature gas generated from a sample in a high-temperature environment.

High-temperature-gas collection apparatus and method

The present disclosure relates to a method for analysis of a deuterium substitution rate of a deuterium-substituted sample according to substitution positions using information of aH-NMR spectrum of the deuterium-substituted sample.

Method for determining the deuterium substitution rate according to substitution positions

The present disclosure relates to a method for analysis of an average deuterium substitution rate of a deuterium-substituted sample using information of aH-NMR spectrum of the deuterium-substituted sample.

Method for determining the average deuterium substitution rate

An on-line system that performs concentration and solvent exchange in order to improve a detection level of analytes by a liquid chromatograph (LC) is provided. The on-line system comprises: a first pump and a second pump for supplying a solvent; a liquid chromatograph (LC) including a separation column (SC) connected to the first pump; a trapping column (TC) for collecting the analytes separated from the separation column; a concentration column (CC) for concentrating the analytes collected in the trapping column (TC); a detector; and first to third switching valves that communicate fluid with at least one of the first or second pumps. An analysis method using the same is also provided.

On-line system for improving detection level of analytes by liquid chromatography and analysis method using same

The present invention relates to an interface unit which can be used in a laser ablation-direct analysis in real time-mass spectrometry (LA-DART-MS) system, and more particularly, provides an interface unit which can be disposed between a DART unit and an MS unit to improve detection sensitivity of a sample laser-ablated by a laser beam.

Interface unit

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

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

The present invention relates to a method for producing test pieces in which the thickness of the samples of homogeneous water-insoluble material is uniform, and to a method for quantitative analysis of water-insoluble material by analyzing such test pieces using MALDI mass spectrometry. Specifically, the test pieces can be produced by: adding a volatile solvent to a mixture of water-insoluble material and matrix; placing, in a pellet cup made of water-soluble material, and pressing, with even pressure, the sample obtained by mixing the mixture of water-insoluble material and matrix until the solvent has evaporated; and melting the pellet cup with water.

Method for producing test pieces of water-insoluble material for MALDI mass spectrometry and method for quantitative analysis of water-insoluble material using MALDI mass spectrometry

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 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 disclosure relates to a method of manufacturing a specimen of a poorly water-soluble material having a uniform thickness by using a sample plate comprising a substrate and a plurality of protrusions located on one surface of the substrate, the protrusion having a flat surface for receiving a force when pressed from the top, and a method for quantitative analysis of a poorly water-soluble material through MALDI mass spectrometry for the specimen.

Method of preparing specimen of poorly water-soluble material for MALDI mass spectrometry and sample plate used therein

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

Disclosed are viologen derivatives as an electrochromic material having improved stability and lifetime, a metal oxide electrode including the same, and an electrochromic device using the viologen derivative as an electrochromic material. The viologen derivative includes a suitable regulator group capable of increasing &#x394;E that is a potential difference between E(potential at the first redox reaction) and E(potential at the second redox reaction). When &#x394;E increases, the mole fraction of viologen molecules present in the second reduction state decreases. Therefore, it is possible to lower the mole fraction of viologen molecules present in an irreversibly reduced state at an applied potential, thereby increasing the lifetime of an electrochromic material and an electrochromic device.

Electrochromic material with improved lifetime

The invention relates to novel herbicidal compounds and compositions. The compounds of the invention are highly substituted derivatives of pyrimidine.

Growing community of inventors

Daejeon, South Korea

Young Hee Lim