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对黄海西部的千里岩、青岛的麦岛两个降水采样点 1 997、1 998两年所收集的 1 1 3个降水样品进行了分析 ,测定了H+、NH+4、K+、Na+、Ca2 +、Mg2 +、F- 、Cl- 、NO-3 、SO2 -4 共 1 0种离子成分的含量。计算了阴离子和阳离子的浓度总量 ,考察了∑ - /∑ +值 ,对所测 1 0种离子的含量顺序进行了探讨。结果表明 :1 1 0个样品离子平衡 (∑ - /∑ +在 0 75～ 1 2 5之间 ) ,3个样品离子不平衡。 1 998年千里岩降水中阴阳离子的含量 (摩尔浓度 )顺序为Cl- >Na+>Ca2 +>SO2 +4>NO-3 >NH+4>Mg2 +>H+>K+>F- ,麦岛降水中阴阳离子的含量顺序为Cl- >SO2 -4 >Na+>NH+4>Ca2 +>H+>NO-3 >Mg2 +>K+>F- 。千里岩降水属于海洋型降水 ,Cl- 、Na+含量高 ,而麦岛是海洋型和硫酸型降水 ,Cl- 、SO2 -4 含量高。
A total of 11 3 precipitation samples collected in the two precipitation sampling points of 997 and 1 988 in the two major Yellow Sea sediment stations in the western Yellow Sea and those in the wheat island of Qingdao were analyzed and the H +, NH + 4, K +, Na +, Ca2 + , Mg2 +, F-, Cl-, NO-3, SO2 -4 total 10 kinds of ion content. The total concentration of anions and cations was calculated. The Σ - / Σ + values were investigated, and the order of the contents of 10 ions were also discussed. The results showed that: 1 1 0 samples were ion-balanced (Σ - / Σ + was between 0 75 and 1 2 5), and 3 samples were unbalanced. In 1998, the contents of anion and cation in the precipitation of the seismolite (molar concentration) were Cl-> Na +> Ca2 +> SO2 +4> NO-3> NH + 4> Mg2 +> H +> K +> F- The order of anion and cation is Cl-> SO2-4> Na +> NH + 4> Ca2 +> H +> NO-3> Mg2 +> K +> F-. Precipitation of the Chrysostom belongs to the ocean type precipitation, Cl-, Na + content is high, while the wheat island is marine and sulfuric acid precipitation, Cl-, SO2 -4 content is high.