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서무열,서무열,엄태윤,최인규,Seo, Mu Yeol,Seo, Mu Yeol,Eom, Tae Yun,Choe, In Gyu 대한화학회 1994 대한화학회지 Vol.38 No.7
Tellurium(Ⅳ)에 대한 네모파 전압전류법적 연구를 HMDE를 사용하여 염산 용액에서 수행하였다. 염산 용액중에서 Tellurium(Ⅳ)의 환원반응은 산에 의한 촉매반응의 특징을 나타내는 비가역적인 과정으로 진행됨을 알 수 있었다. 본 연구에서는 또한 네모파 전압전류법에 의한 Tellurium(Ⅳ)의 분석 조건 및 방해이온들에 대하여 검토하였다. 이 방법에 의한 Tellurium(Ⅳ)의 검출한계는 $4.2\;ppb (3.3{\tiems}10^{-8}M)$이었으며, 전극표면에서의 4.2 Tellurium(Ⅳ)의 양은 ${\Gamma}=(7.2{\pm}1.4){\times}10^{-11}\;mol\;cm^{-2}$이었다. Square-wave voltammetric behavior for tellurium(Ⅳ) was studied in hydrochloric acid medium using a hanging mercury drop electrode. The reduction of tellurium(Ⅳ) was found to be irreversible and catalized by acid. Analytical conditions for the determination of tellurium(Ⅳ) and effects of diverse ions were also investigated. The detection limit of tellurium(Ⅳ) was $4.2\;ppb (3.3{\tiems}10^{-8}M)$. The amount of tellurium(Ⅳ) on the electrode surface was ${\Gamma}=(7.2{\pm}1.4){\times}10^{-11}\;mol\;cm^{-2}$.
서무열,노준화 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.2
Purpose: We evaluated the long-term outcome of a readjustable midurethral sling system(Remeex) in the treatment of recurrence of stress urinary incontinence (SUI) aftersurgical treatment or SUI with intrinsic sphincter deficiency (ISD). Materials and Methods: This study included 19 patients who underwent the Remeexprocedure with a mean of 45.6 months of follow-up. The patients had responded to atelephone questionnaire. Thirteen patients had ISD, four patients had SUI recurrence,and two patients had both. The questionnaire included subjective cure and satisfactionsurveys and also recommended surgery to some patients. Results: The mean patient age was 69.1 years (range, 50–85 years), the mean paritywas 2.79 times (range, 2–5 times), and the mean follow-up period was 45.6 months(range, 21–72 months). The long-term follow-up cure rate was 79%, the improvementrate was 21%, and the fail rate was 0%. The long-term follow-up “very satisfactory” ratewas 26.3%, the “satisfactory” rate was 73.7%, and the “usual” and “unsatisfactory” rateswere both 0%. In addition to these results, 16 patients (84.2%) would recommend theRemeex procedure to other patients with SUI recurrence or ISD. After the procedure,four patients had urinary retention, three patients had difficulty emptying, and onepatient had SUI recurrence. Furthermore, all of the patients subsequently enduredsling readjustments. Conclusions: After long-term follow-up, the Remeex system showed good cure rates andsubjective satisfaction rates that were similar to the results found at the 1-year follow-up, and minimal complications were reported. Therefore, the Remeex system iseffective in treating patients with SUI recurrence or ISD.
유도결합플라스마 질량분석을 위한 사용후핵연료 중 테크네튬-99의 추출크로마토그래피 분리
서무열,이창헌,한성호,박영재,지광용,김원호 한국분석과학회 2004 분석과학 Vol.17 No.5
To determine the contents of 99Tc in the spent PWR (pressurized water reactor) nuclear fuels by ICP-MS (inductively coupled plasma-mass spectrometry), a technetium separation method using an extraction chromatographic resin (TEVA·Spec resin) has been established. 99Tc was separated from a spent PWR nuclear fuel solution by this separation procedure and its concentration was determined by ICP-MS. The result agrees well with the value calculated by the program ORIGEN 2 and also the value measured by AG MP-1 resin/ICP-MS method described in our previous paper. It can be concluded that the present separation procedure is superior to the AG MP-1 resin procedure with respect to the time required for technetium separation as well as the efficiency of decontamination from other radioactive nuclides
Gran Plot 적정법을 이용한 U(VI)-AI(III) 용액의 자유산 농도 측정
서무열,이창헌,손세철,김정석,김원호,엄태윤,Suh, Moo-Yul,Lee, Chang-Heon,Sohn, Se-Chul,Kim, Jung-Suk,Kim, Won-Ho,Eom, Tae-Yoon 한국분석과학회 1999 분석과학 Vol.12 No.3
사용후 U-Al 핵연료 용해용액의 자유산 농도 측정에 이용할 수 있는 Gran plot적정법을 개발하였다. 질산을 염기로 적정할 때 미치는 U(VI)과 Al(III)의 영향을 옥살산칼륨 착화제가 함유된 적정매질과 함유되지 않은 적정매질에서 조사하였다. Gran plot방법으로 종말점을 구할 경우 두 가지 매질에서 모두 양의 오차가 있었으며, 착화제가 함유된 매질에서는 U(VI)이 그리고 착화제가 없는 매질에서는 Al(III)이 오차의 원인이었다. 옥살산칼륨 적정매질에 첨가하는 시료량을 조절하여 pH 5.0 이하에서 적정을 시작함으로써 오차를 줄일 수 있었으며, 질산 농도가 0.1 M이고 U(VI) : Al(III) : $H^+$의 몰비율이 2:12:1인 시료의 질산 농도 측정오차는 1%이하였다. 이 방법으로 U:Al의 몰비율이 1:6인 하나로핵연료 용해용액의 질산 농도를 정확하게 측정할 수 있었다. The determination method of free acid in spent U-Al nuclear fuel solutions by Gran plot titration was described. Effect of U(VI) and Al(III) on the alkalimetric titration of nitric acid was investigated in oxalate complexing media as well as in noncomplexing media. Positive biases were observed in both titration media when the end-point was estimated by the Gran plot method. It was found that the cause of the bias was U(VI) in the oxalate complexing media, but Al(III) in the noncomplexing media. The relative error was less than 1% in the titration of 0.1 M $HNO_3$ at a U(VI) : Al(III) : $H^+$ mole ratio of up to 2:12:1 as long as the pH of the oxalate titration media was sustained to be below 5.0 at the beginning of titration. The method was successfully applied to the determination of nitric acid in a solution of HANARO reactor fuel with U:Al mole ratio of 1:6.