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염태호,성누리,박지민,홍원표 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
CMIT/MIT(Chloromethylisothiazolinone/Methylisothiazolinone) methyl has been widely used as a powerful preservative in household chemicals. However, regulations are being enforced across households due to strong inhalation toxicity. Related manufacturers need standard materials to check the contents and contents of CMIT/MIT in raw materials and finished products. A reference material must have the same or similar medium as a sample to compensate for the effect of the medium. Surfactants and spices are used as the main ingredients of cleaning agents, and various raw materials such as surfactants, fatty acids, waxes, diluents, preservatives, and spices are used for cosmetics. CMIT/MIT is developed by pro-nuclear attacks and is greatly affected by pH. In this study, the key goal is to create a chemical environment so that CMIT/MIT can exist reliably in cleaning agents and cosmetics media. Currently, CMIT/MIT standard substances in the form of living chemicals are not supplied at home and abroad. KTR is developing cosmetics cream preparation and cleaning liquid CMIT/MIT standard materials as a standard substance production agency and is planning to supply them to industries after 2023.
Study for Residue Analysis of Pinoxaden in Agricultural Commodities
김지영,윤은경,김종수,성누리,윤상순,정용현,오재호,김효진 한국환경농학회 2019 한국환경농학회지 Vol.38 No.4
BACKGROUND: Pinoxaden is the phenylpyrazoline herbicide developed by Syngenta Crop Protection, Inc. and marketed on 2006. The maximum residue levels for wheat and barley were set by import tolerance. Thus, Ministry of Food and Drug Safety (MFDS) official analytical method determining Pinoxaden residue was necessary in various food matrixes. Satisfaction of international guideline of CODEX (Codex Alimentarius Commission CAC/GL 40) and National Institute of Food and Drug Safety EvaluationMFDS (2017) are additional pre-requirements for analytical method. In this study, liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was investigated to analyze residue of Pinoxaden (M4), which is defined as pesticide residue in Korea, in foods. METHODS AND RESULTS: Pinoxaden (M4) was extracted followed by acid digestion (2hr reflux with 1N HCl) and pH adjusting (pH 4-5 with 3% ammonium solution). To remove oil, additional clean-up step with hexane saturated with acetonitrile was required to high oil contained sample before purification. HLB cartridge and nylon syringe filter were used for purification. Then, samples were analyzed by LC-MS/MS using reserve phase column C18. Five agricultural group representative commodities (mandarin, potato, soybean, hulled rice, and chilli pepper) were used to verify the method in this study. The liner matrix-matched calibration curves were confirmed with coefficient of determination (r2 ) > 0.99 at calibration range 0.002-0.2 mg/kg. The limits of detection and quantitation were 0.004 and 0.01 mg/kg, respectively, which were suitable to apply Positive List System (PLS). Mean average accuracies of pinoxaden (M4) were shown to be 74.0-105.7%. The precision of pinoxaden and its metabolites were also shown less than 14.5% for all five samples. CONCLUSION: The method investigated in this study was suitable to CODEX (CAC/GL 40) and National Institute of Food and Drug Safety Evaluation-MFDS (2017) guideline for residue analysis. Thus, this method can be useful for determining the residue in various food matrixes in routine analysis.
Low-Dye 테이핑 적용이 아치회복운동을 시행한 편평족의 장딴지근력에 미치는 효과
박재규,김광록,김건우,김민지,노수빈,성누가,김진아,Park, Jae-Gyu,Kim, Gwang-Rok,Kim, Gun-Woo,Kim, Min-Ji,No, Su-Bin,Sung, Nu-Ga,Kim, Jin-A 한국임상보건과학회 2016 한국임상보건과학회지 Vol.4 No.3
Purpose. The purpose of this study was to progress the effect of gastrocnemius strength when groups are applicated on low-dye taping group and without taping group of flatfoot with arch-recovery exercise. Methods. Subjects were measured navicular drop test to confirm of 16 university student in J city, low-dye taping group and without taping group were applicated both with arch-recovery exercise, three times per a week for four weeks. The power track were measured four weeks, total 3 times. Comparative analysis of the control group and experimental group were investigated of gastrocnemius strength. Results. The results, we found that after of arch-recovery exercise were significantly increased than before of arch-recovery exercise in each foot. And application of low-dye taping(experimental group) in flatfoot with arch-recovery exercise were significantly increased than control group. Conclusions. In conclusion, the arch-recovery exercise application were effective to low-dye taping significantly increase the gastrocnemius strength of flatfoot.
LC-MS/MS를 이용한 농산물 중 이미다졸리논계 농약의 시험법 개발
김지영 ( Ji Young Kim ),김효진 ( Hyochin Kim ),송지영 ( Ji Young Song ),한아름 ( A Reum Han ),성누리 ( Nu Ri Sung ),윤상순 ( Sang Soon Yoon ),정용현 ( Yong Hyun Jung ),오재호 ( Jae Ho Oh ),김종수 ( Jong Soo Kim ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
Imidazolinone herbicides (Imazapyr, Imazalil, Imazamox, Imazaquin, Imazapic, Imazamethabenzmethyl and Imazethapyr) control weeds by inhibiting the enzyme acetohydroxyacid synthase(AHAS), also known as acetolactate synthase (ALS). AHAS is critical enzyme for the biosynthesis of branched chain amino acids in plants. Currently, each individual analytical method for Imidazoline herbicides is used as Ministry Food and Drug Safety (MFDS) method. Thus it consumes lots of time and effort to determine residue of Imidazolinone group in food. A Single analytical method for the determination of Imidazolinone residue in foods was developed as Ministry of Food and Drug Safety (MFDS) method. Five agricultural commodities (mandarin, potato, soybean, brown rice, and chilli pepper) were used as group representative to verify. After extracting with 1% formic acid in acetonitrile, samples were partitioned by citrate buffer. To remove the interferences, dispersive-SPE using C18 and PSA was performed before LC-MS/MS (Liquid Chromatography -Tandem Mass Spectrometry). The liner standard calibration curve were confirmed (coefficient of determination with calibration range). Mean average accuracies were shown 72.0~116.6 %. The precision were also shown less than 11.6% for all five samples. Thus, this method is acceptable to CODEX guideline for residue analysis (CAC/GL 40). Is sum, the proposed method for Imidazolinone group residue determination can be suitable for CODEX guidelines and useful as government method.