본 연구는 경기도에 유통되는 기능성 쌀을 대상으로 농약 및 이산화황의 잔류실태를 조사하고 위해성평가를 실시하였다. 2016년 2월부터 10월까지 대형마트 및 재래시 장에서 유통되는 기능성 쌀 91건을 수거하여 수행하였다. GC/ECD, GC/NPD, GC/TOF/MS, LC/PDA, LC/FLD를 이 용한 다종농약다성분 분석법으로 220종의 잔류농약검사를 실시한 결과 3건(3.3%)에서 2종의 농약성분이 검출되었다. 검출된 농약은 살균제 농약인 propiconazole과 살균제 및 식물생장조절제 농약인 isoprothiolane이며, 검출수준은 0.0340~0.0566 mg/kg으로 MRL (Maximum Residues Limits) 대비 각각 34%, 2.8% 이하로 검출되었다. Monier-Williams 변법을 이용하여 이산화황(sulfur dioxide)을 분석한 결과 91건의 시료 모두 불검출이었다. 농약 검출량을 바탕으로 일일섭취추정량(EDI)과 일일섭취허용량(ADI)을 이용하여 위해성평가를 한 결과 %ADI (Hazard Index)는 0.24~ 1.25%로 안전한 수준이었다.

본 연구는 국내 유통되고 있는 건조 농산물 중 33종의 고구마말랭이에 대하여 이산화황, 카로티노이드 함량 및 바실러스 세레우스 오염 정도를 조사하였다. 고구마말랭이의 시료별 특징에 따라 4가지의 군집으로 분류하여 각 군집간의 이산화황, 카로티노이드 함량 및 바실러스 세레 우스 함량을 조사한 결과, 각 군집간의 유의적인 차이는 나타나지 않았다. 33개의 고구마말랭이에서 잔류 이산화 황이 검출 범위는 0.38~28.16 mg/kg으로 기준인 10 mg/kg 이상으로 검출된 경우는 3건(9.09%) 이었지만, 고구마말 랭이의 이산화황 잔류 허용 기준치인 30 mg/kg을 초과하는 시료는 나타나지 않았다. 고구마말랭이는 카로티노이드에 대한 규격 기준이 없으므로 카로티노이드의 국·내 외 기준을 비교하였을 때, 본 실험에서 검출된 고구마말랭이의 카로티노이드 검출 범위는 46~2663 μg/100 g 로 카로티노이드의 함량 기준인 0~9,826 μg/100 g 의 범위 내로 확인되었다. 고구마말랭이 시료에서 바실러스 세레우스로 추정되는 집락은 대체적으로 검출되지 않았으며 7건(21.21%) 에서만 0.05~1.59 log CFU/g 범위로 검출되었지만 국내 기준치인 3 log CFU/g 은 넘지 않는 것으로 확인되었다. 본 연구결과는 건조 농산물 중 고구마말랭이에 대한 기준규 격 제정 시 품질 지표 기준으로 설정할 수 있는 기초자료 로서 활용될 것으로 판단되며 국내 유통중인 고구마말랭 이에 대한 품질 관리를 위해서는 원재료부터 건조 방법 그리고 포장 후 유통까지 안정하게 공정 과정이 진행되도 록 지속적인 관리 및 유지를 해야 될 것으로 사료된다.

서울특별시 용산구의 측정망에서 2004년부터 2013년간 관측한 대기질 자료를 중심으로 SO2의 환경거동을 시간적 기준으로 다양한 관점에서 분석하였다. 이와 동시에 관측한 기타 대기오염물질들(PM2.5, PM10, TSP, CH4, CO, NO, NO2, NOx, O3, THC, NMHC)의 농도자료와 기상자료들과의 관계를 해석하는 방식으로 SO2의 거동을 조사하였다. 10년간 측정한 용산구 지역에서 측정한 SO2의 연간 평균농도는 대기환경기준치인 20nmole mole-1보다 5배 정도 낮은 4.36-5.86(최저-최고) nmole mole-1 수준으로 나타났다. 이는 연간 평균농도가 관리기준치를 초과하는 성분들과 뚜렷하게 대조적인 양상을 보였다. 여러 가지 통계적 기법을 적용하여 SO2의 배출량에 영향을 미치는 요인들을 파악하였다. 그리고 용산구에서 측정한 SO2와 기타대기오염물질, 기상자료들의 경향성을 비교해보았다. SO2은 온도 및 기타물질들에 대한 상관성이 있는 것으로 나타났다. 또한 본 연구의 결과에 의하면, SO2은 다른 대기오염물질들에 비해 상대적으로 관리가 잘 이루어지고 있다는 것을 확인할 수 있다.

This study was carried out to investigate the residual sulfur dioxide residues (SO2) in commercial medicinal herbs in Korea in 2013. Among a total of 116 samples of 11 different kinds of herbs, 71 samples (11 Kinds) were domestic, and 45 samples (10 Kinds) were imported. The residual contents of SO2 in the samples were determinated by a modified Monier-Williams method. Of the 116 samples, 6 samples (5.2%, 4 Kinds) failed to meet the regulations for sulfur dioxide residues of KFDA in medicinal herbs. Among 6 unsuitable samples, 1 samples (1.4%) were domestic, and 5 samples (11.1%, 3 Kinds) were imported. The highest amount of sulfur dioxide residues was 1546.3 mg/kg (Lycii Fructus) in the domestic samples. Regardless of region, SO2 contents were not found at Anemarrhenae Rhizoma, Citri Unshius Pericarpium, Eucommiae Cortex, Forsythiae Fructus, Gardeniae Fructus, Leonuri Herba and Lonicerae Folium et caulis. These data will be used as a basic data for the future legislation on the regulation and control of sulfur dioxide of herbal medicines.

This study was investigated to determine the contents of sulfur dioxide residues in medicinal herbs in Seoul Yang Nyoung Shi in 2010 (1,522 samples of 189 kinds). Samples were measured by modified Monier-Williams method. Of the total samples, 618 samples (84 kinds) were domestic, and 904 samples (158 kinds) were imported. The content of sulfur dioxide in the domestics showed the range of 0.0 to 1,298.0 mg/kg (average 12.7 mg/kg), while those in imported samples were the range of 0.0 to 3,982.2 mg/kg (average 42.4 mg/kg). The average (mg/kg) amount of sulfur dioxide by parts in medicinal herbs was as follows; Tuber 122.3, Radix 69.3, Rhizoma 37.4, Cortex 33.3, Fructus 8.8, Ramulus 4.9, Semen 4.6, Folium 3.4, Flos 2.7, Perithecium 1.4. Of the total samples (1,522), 52 samples (3.4%) were violated the KFDA regulatory guidance of sulfur dioxide. Among these 52 unsuitable samples, 16samples (7 kinds) were domestic, and 36 samples (23 kinds) were imported. Approximately 88.1% of the total samples was less than 10 mg/kg of sulfur dioxide and 6.3% of the total samples showed more than 30 mg/kg of sulfur dioxide.

Polymer electrolyte membrane fuel cell (PEMFC) performance degrade when sulfur dioxide is present in the fuel hydrogen gas, this is referred as SO2 poisoning. This paper reveals SO2 poisoning on PEMFC cathode part by measuring electrical performance of single cell under 1 ppm and 5 ppm on SO2 gas operating. The security of SO2 poisoning depended on SO2 concentration under the best operating conditions(65℃ of cell temperature and 100% of relative humidity between anode and cathode). SO2 adsorption occured on the surface of catalyst layer on membrane electrode assembly (MEA), In addition, MEA poisoning by SO2 was cumulative but reversible. After poisoning within 5 ppm SO2 for 1hr, the electrical performance of PEMFC was found to recover up to about 93% by cyclic voltametry scan.

This study was planned to monitor the change in the content of sulfur dioxide during the drying process of fresh vegetables. The analysis of sulfur dioxide was conducted by the Optimized Monier-Williams Method based on the Korea Food Code. The samples were kinds of vegetables which consisted of naturally-originated sulfur compounds (green onion, onion, cabbage, garlic, radish leaves, radish). Fresh vegetables (n = 182) and dried vegetables (n = 41) purchased from different local areas were investigated for the content of sulfur dioxide. The fresh vegetables were dried at 50~60℃ using hot-air dryer. The moisture contents of dried samples were adjusted to keep 10percents. The contents of sulfur dioxide in self-dried vegetables were 104.6 mg/kg in green onion, 75.4 mg/kg in onion, 129.1 mg/kg in cabbage, 197.6 mg/kg in garlic, 23.0 mg/kg in radish leaves and 52.5 mg/kg in radish, respectively. The increase of sulfur dioxide content according to the moisture content reduction was different from the expected. It means that the contents of sulfur dioxide can be altered by other factors except moisture contents. This results can be utilized as materials for the safe management of sulfites of dried vegetables.

The levels of sulfites in wooden chopsticks were analyzed using two different methods, distillation- alkali titration and ion chromatography. According to the two methods, Sulfur dioxide (SO₂) was validated by 0.6 and 0.2 μg/ml of limit of detection (LOD), 1.8 and 0.5 μg/ml of limit of quantification, (LOQ) and a R² > 0.998 for linearity, respectively. The recoveries of SO₂ from food simulants spiked ar levels of 100 ppm were 70.2-100.2%. 158 samples of wooden chopsticks were monitored the migrated amounts of sulfites. Sulfites were detected in 30 samples in ranged of 0.6 to 15.5 ppm. Maximum migration level, 15.5 ppm of sulfites was considered giving no harmful effect to human since it was reached 5.5% of estimated SML.

이산화황 흡수 수용액이 다공성 분리막 접촉기를 연속적으로 순환하는 시스템에서 다양한 운전변수에 따른 이산화황의 분리 효율을 고찰하였다. 공급 기체로는 이산화황/공기 혼합 기체를 사용하였으며 흡수제로는 Na2SO3 수용액을 사용하였다. 운전 변수들인 흡수제 농도와 공급 기체 내의 이산화황 농도, 분리막 재질, 흡수제 유속 변화에 따른 분리 효율에 대한 영향을 확인하고자 하였다. 흡수제의 농도 0.05 M에서 0.2 M로 증가할수록 이산화황 제거 효율은 74%에서 100%로 증가하였다. 이산화황 농도가 700 ppm에서 2,500 ppm으로 증가할수록 제거 효율은 100%에서 75%로 감소하였다. 또한 흡수제의 유속이 2.5 mL/min에서 15 mL/min으로 증가할수록 제거 효율은 85%에서 100%로 증가하였고, 분리막은 기공률이 클수록 제거 효율이 증가함을 확인할 수 있었다.

산성비의 한 가지 원인으로 알려진 이산화황(SO2 수식 이미지)을 포함한 대기 오염물질인 연도 기체의 배출 허용 기준이 엄격해지고 있다. 배연 탈황 기술의 효율을 획기적으로 높일 수 있는 분리막 접촉기의 개발에 필요한 기초 설계 자료를 제공하고자 평판형 분리막 접촉기 실험 장치를 설계 및 설치하여 이산화황 투과 특성 평가를 수행하였다. 평판형 분리막 접촉기를 이용한 이산화황의 제거에 미치는 흡수제 농도와 공급 기체 내의 이산화황 농도의 영향, 공급 기체 유량 및 분리막 재질에 따른 영향을 확인하고자 하였다. 흡수제 농도가 증가할수록 이산화황 제거 효율이 증가하였으며, 이산화황 농도가 증가할수록 제거 효율이 감소하였다. 또한 공급 기체 유량이 증가할수록 제거 효율이 감소하였으며 분리막 재질은 제거 효율에 큰 영향을 끼치지 않음을 확인할 수 있었다.

Background: Turmeric (Curcuma longa L.) that is used as a food material has antioxidant, anticancer and anti-inflammatory properties. Recently the demand for functional foods and drugs has increased. The present study was carried out to determined of contents of residual sulfur dioxide, heavy metals, ash, acid insoluble ash and curcuminoids in turmeric from the Seoul Yak-ryeong market. Methods and Results: A total of 31 samples were obtained. Residual sulfur dioxide was not detected in any samples. Heavy metals (arsenic, cadmium, lead and mercury) were analyzed by ICP-MS (Inductively Coupled Plasma Mass Spectrometer) and a mercury analyzer and were detected in the ranges of 0.00 - 0.28, 0.00 - 0.07, 0.00 - 0.29 and 0.002 - 0.027㎎/g respectively. No significant difference were observed between the average heavy metal contents of domestic and imported tumeric. However, average content of ash in domestic samples (7.8%) were significantly higher than that in imported samples (6.1%), whereas that of curcuminoids was significantly higher in imported samples (47.6㎎/g) than in domestic samples (11.2㎎/g). The average content of acid insoluble ash was not significantly different between two sample types (0.9% in each). Conclusions: There are no specific standards for turmeric used as food materials. Therefore, this study can be provided as basic data for the establishment of quality standards for turmeric.

This study was conducted to investigate the residual contents of sulfur dioxide (SO2) in commercial medicinal herbs in Korea in 2012. Among a total of 136 samples of 16 different kinds of herbs, 86 samples (15 Kinds) were domestic, and 50 samples (14 Kinds) were imported. Sulfur dioxide in the samples was measured by a modified Monier-Williams method. Of the 136 samples, 17 samples (12.5%, 6 Kinds) failed to meet the regulations for sulfur dioxide residues of KFDA in medicinal herbs. Among 17 unsuitable samples, 7 samples (8.1%, 3 Kinds) were domestic, and 10 samples (20.0%, 6 Kinds) were imported. The highest amount of sulfur dioxide residues was 3,167.94 mg/kg (Lycii Fructus) in the domestic samples. The detection frequency of sulfur dioxide by medicinal herb parts used, Rhizoma 25.7%, Flos 20.0%. Cortex 12.5%, Radix 15.3%, Fructus 7.6%, p-value 0.011. This results will be used as a basic data for the future legislation on the quality estimation and safety of medicinal herbs.

This study was conducted to investigate the content of sulfur dioxide residues in medicinal herbs in Seoul in 2009. Sulfur dioxide in the samples were determined by Monnier-Williams's modified method. A total of 1,821 samples of 205 different types of herbs were collected from Kyung-Dong Herb markets and Oriental medicine hospitals in Seoul. Of these samples, 642 samples were domestic, and 1,179 samples were imported. Of the 1,821 samples, 61 (3.3%, 31 types) failed to meet the regulations for sulfur dioxide residues of KFDA in medicinal herbs. Among these 61 unsuitable samples, 17 (7 types) were domestic, and 44 samples (26 types) were imported. The content of sulfur dioxide in the domestic medicinal herbs ranged from 0 to 809 mg/kg, while those in imported medicinal herbs ranged from 0 to 4,481 mg/kg. Approximately 84.6% of the samples contained less than 10 mg/kg of sulfur dioxide and about 10.0% of samples contained more than 30 mg/kg of sulfur dioxide.

Until comparatively lately, the annual time series of the SO2 concentration had been shown in a decreasing trend in Ulsan as well as other Korean cities. However, the high concentration of SO2 was frequently found in the specific countermeasure region including the national industrial complex such as Mipo and Onsan in the Ulsan city for the period of 2001∼2004. There are many conditions that can influence the high concentration of SO2 at monitoring sites in Ulsan, such as: First, annual usage of the fuel including sulfur increased in comparison with the year before in spite of the fuel conversion policy which wants to use low sulfur oil less than 3% and LNG. Second, point source, such as the power plants and the petroleum and chemistry stacks, was the biggest contributor in SO2 emission, as a analyzed result of both the air quality modeling and the stack tele-monitoring system (TMS) data. And third, the air pollutants that occurred in processes of burning and manufacturing of the fuel including sulfur were transported slow into a special monitoring site by accumulating along the frontal area of see-breeze. It was concluded that Ulsan's current environmental policy together with control methods should be changed into the regulation on total amount of emission, including a market-based emission trading with calculating of atmospheric environmental critical loads, for the SO2 reduction like the specific countermeasure for the O3 and PM10 reduction in the Seoul metropolitan area. And this change should be started in the big point sources of 1∼3 species because they are big contributors of Ulsan's SO2 pollution. Especially it is necessary to revitalize of the self-regulation environmental management. Other control methods for sustaining the SO2 reduction are as follows: maintenance of the fuel conversion policy, reinforcement of the regional stationary source emission standard, and enlargement of the stack TMS.

This study was investigated the residual contents of sulfur dioxide on the 373 kinds of herbal medicine distributed from Korea, China, and Japan. A modified Monier-Williams method was described for the determination of SO2 contents in herbal medicines. The residual contents of SO2 were not detected at 221 products(59.8%) in total 373 products. Regardless of region, SO2 contents were not found at Farfarae Flos, Zizyphi Spinosi Semen, Castanea crenata, and Strychni Ignatii Semen. But it's found at Asparagi Radix, Codonopsitis Radix, Lilii Bulbus, and Kaempferiae Rhizoma of every region collected the samples. Also, SO2 contents were not detected at the herbal medicines which collected cultural fields of dometic. SO2 contents ranged 11～3990 mg/kg(mean 152 mg/kg) at domestic samples, 11～3440 mg/kg(mean 603 mg/kg) at imported samples. After treated with water wash and hot water extraction, the reduction rates of sulfur dioxide were appeared with 24.4%～68.7% and 83.8%～100.0%, respectively. These data will be used to establish a criteron of residual sulfur dioxide in herbal medicines.

The Characteristics of atmospheric flow and dispersion of air pollutants in the mountainous coastal area were studied using two-dimensional model by the combination of land-sea breezes and transport. The pollutants emitted into the simulated wind field in considering with the mesoscale local circulations. The typical effects of land-sea breezes and tophography of coastal area on the dispersion are discussed in detail, and the model is proved as an useful tool to pridict real time pollutant transport by the results of application studies in Pusan, Korea where the urbanized coastal area with mountainous topography. It was found that sulfur dioxide (SO2) are differently transported and concentrated as going inland by the influence of the sea breeze with topographic changes.