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신형선,최민석 한국환경농학회 2013 한국환경농학회 워크샵자료 Vol.2013 No.1
The strontium (Sr) isotope has the potential to reveal important information concerning a wide range of environmental and geological (Capo et al.1998). Recently, the use of isotope ratio of 87Sr/86Sr can be used powerful tool in studies of some agriculture. Because, the 87Sr/86Sr isotope ratio was estimated not to change during biological processes and reflects in plants from the water, soil and rock. the application of Sr isotopes as a provenance tracer requires the defined analytical methods and then, this procedure need to purified the St isotope of interest prior to measurement because of interference 87Rb and Ca. Hence, most previous studies were characterized extraction techniques using a cation exchange or Sr resin process to remove specific interference (Barbaste et al. 2002). Hence, we quantify the extent that interferences from 87Rb and Ca effect. The experiments are defined for the best analytical methods using the simple chemistry separations.
수소화합물 발생법-유도결합플라스마 원자방출 분광기를 이용한 암석및 퇴적물중 미량의 게르마늄 분석
신형선,최만식,김강진,Shin, Hyung Seon,Choi, Man Sik,Kim, Kang Jin 대한화학회 1997 대한화학회지 Vol.41 No.8
We examined the determination of trace amount of germanium in rocks and sediments by hydride vapor generation-ICP-AES. Germanium is formed volatile compounds with various types of acid reagents, but volatilizing of germanium was decreased in the presence of $H_3PO_4$. Sediments and rocks can be dissolved by mixed acids of $HF-HNO_3-H_3PO_4$ without volatilizing loss of germanium in open digestion system and it was possible to determine germanium by hydride generation-ICP-AES without further sample treatment. Detection limit of Ge is reached to 0.08 ppb under the condition of 5M $H_3PO_4$ and 1% $NaBH_4$ as a supporting acid and a reducing reagent, respectively. The measured values by hydride generation-ICP-AES agreed well with the reference values of SRMs as well as the values determined by solution nebulization-ICP-MS. 수소화합물 발생법-유도결합플라스마 원자방출 분광기로 암석및 퇴적물 시료중에 미량으로 존재하는 게르마늄을 효과적으로 분석하는 방법을 찾는 실험이다. 고체시료를 산분해하여 용액화할 때 게르마늄은 휘발성이 강한 화합물을 형성하지만 $H_3PO_4$가 존재하면 휘발이 억제되므로 $HF-HNO_3-H_3PO_4$의 혼합산을 사용하면 게르마늄의 휘발없이 open digestion system으로 고체 시료의 완전 용해가 가능하다. 또한 이 용액으로 다른 전처리 과정없이 수소화합물 발생법으로 분석이 가능하다. 게르마늄 수소화합물 발생법에서는 보조산으로 5M $H_3PO_4$와 환원제로 1% $NaBH_4$을 사용하여 검출한계를 0.08 ppb까지 얻을 수 있었으며 이 조건에서는 시료중에 과량으로 존재하는 공존원소의 방해도 무시할 수 있었다. 표준시료의 분석값이 보고된 값과 잘 일치하였으며 ICP-MS의 용액시료 도입법으로 측정한 값과도 잘 일치하였다.
박계헌,신형선,한정희,Park, Kye-Hun,Shin, Hyung-Seon,Han, Cheong-Hee 대한자원환경지질학회 1996 자원환경지질 Vol.29 No.1
Inductively coupled plasma atomic emission spectrophotometer (ICP/AES) is a versatile modern instruments for the multi-element analysis, but quantitative analysis using ICP/AES with normal pneumatic nebulizer is not applicable for the measurement of elemental concentrations in water down to the drinkining water standard level except a few elements because of poor detection limits. However, the detection limit can be lowered enough to measure drinking water standard, if ultrasonic nebulizer and/or hydride vapor generator is attached. This method is tested with groundwater samples from Tajeon area. It is confirmed that the elemental concentrations in these samples are within the limit of drinking water standard for the most elements. However, uranium concentration is very high in some samples compared with the concentrations suggested by Environmental Protection Agency of U.S.A. There is no standard concentration level to this element in Korea and it should be prepared immediately.
송현수,신형선,김강진,Song Hyung-Soo,Shin Hyung Seon,Kim Kang-Jin Korean Chemical Society 1988 Bulletin of the Korean Chemical Society Vol.9 No.1
A mechanistic study on the chemiluminescence resulting from the reaction between bis(2,4,6-trichlorophenyl)oxalate(TCPO) and hydrogen peroxide in the presence of fluorescent polycyclic aromatic hydrocarbons in a viscous phthalate medium has been conducted. The rate determining step, decay rate constants, and relative quantum efficiencies yielded by varying the concentration of reagents generally support an existing mechanism. However, a reaction between TCPO and sodium salicylate was not observed.