1999-2000년 제주시 지역 강수의 유기산 함량 분석 = Quantitative Analysis of Organic Acids in Precipitation at Cheju City during 1999-2000

다국어 초록 (Multilingual Abstract)

The precipitation samples at Cheju city were collected during the period of January in 1999 to December in 2000, and the organic acids as well as the major soluble ions were analyzed. The confidence of analytical data was confirmed by using the comparison methods such as ion-balance, electric conductivity and acid fraction, all of whose correlation coefficients were over 0.97. The ionic strengths lower than 10^(-4)M, the basis for the pure rainwater, were 46% and 30% in 1999 and 2000 respectively. The acidity contribution was mostly by SO₄^(2-) and NO₃^(-) with 90% in 1999 and 93% in 2000, and the organic acids have contributed to the acidity with only 4%. The neutralization factors by NH₃were about 0.48 and 0.34 in 1999 and 2000, whereas those by CaC0₃ were 0.22 and 0.26 respectively. The sources of the precipitation components in Cheju city were also studied with a factor analyzing method. The most probable factors were found to be anthropogenic and soil-sourced, and the second influencing factor was to be oceanic.