有機スズ化合物に関する環境調査結果・本文に戻る 有機スズ化合物表一覧に戻る
第5部 平成10年度有機スズ化合物に関する環境調査結果の概要 |
表9 トリブチルスズ化合物に関する水質調査結果(平成7年度~10年度指定化学物質等検討調査より) |
(単位:μg/l) |
調 査 地 点 | 平成7年度 | 平成8年度 | 平成9年度 | 平成10年度 | ||||||||
検体1 | 検体2 | 検体3 | 検体1 | 検体2 | 検体3 | 検体1 | 検体2 | 検体3 | 検体1 | 検体2 | 検体3 | |
石狩川河口 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
堤川河口 | nd | nd | nd | nd | nd | nd | - | - | - | |||
仙台湾 | nd | nd | nd | nd | nd | nd | nd | nd | nd | - | - | - |
八郎湖 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
小名浜港 | nd | nd | nd | nd | 0.005 | nd | 0.005 | 0.004 | 0.004 | - | - | - |
霞ケ浦 | nd | nd | nd | nd | nd | nd | nd | nd | nd | - | - | - |
市原・姉崎海岸 | nd | nd | nd | nd | nd | nd | nd | nd | nd | tr(0.0013) | nd | tr(0.00037) |
花見川河口 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
隅田川河口 | 0.005 | 0.005 | 0.006 | 0.005 | 0.004 | 0.004 | 0.006 | 0.008 | 0.006 | 0.0060 | 0.0066 | 0.0064 |
多摩川河口 | 0.003 | 0.003 | nd | 0.003 | nd | nd | nd | nd | nd | 0.0046 | 0.0038 | 0.0045 |
横浜港 | 0.004 | 0.003 | nd | 0.004 | nd | 0.003 | 0.004 | nd | nd | 0.0043 | 0.0063 | 0.0051 |
信濃川河口 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
犀川河口 | 0.005 | nd | 0.01 | nd | nd | nd | nd | 0.009 | nd | nd | nd | nd |
諏訪湖 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
清水港 | nd | nd | nd | 0.005 | nd | nd | nd | nd | 0.004 | 0.005 | - | - |
名古屋港 | nd | nd | nd | nd | nd | nd | nd | nd | nd | - | - | - |
四日市港 | 0.006 | nd | 0.008 | 0.003 | 0.004 | nd | tr(0.002) | nd | nd | nd | nd | nd |
琵琶湖南湖 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
宮津港 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
桂川宮前橋 | nd | nd | nd | nd | nd | nd | nd | nd | nd | - | - | - |
大和川河口 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
大阪港 | 0.01 | 0.011 | 0.013 | 0.008 | 0.011 | 0.008 | 0.006 | 0.007 | 0.006 | 0.0032 | 0.0031 | 0.0031 |
姫路沖 | 0.042 | 0.016 | 0.018 | nd | 0.005 | 0.009 | nd | 0.005 | nd | nd | nd | nd |
水島沖 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
呉港 | ||||||||||||
広島湾 | nd | nd | nd | nd | nd | nd | nd | nd | nd | - | - | - |
徳山湾 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
吉野川河口 | nd | nd | nd | nd | 0.003 | nd | nd | nd | nd | - | - | - |
高松港 | 0.004 | 0.004 | 0.006 | 0.012 | 0.014 | 0.003 | nd | 0.007 | 0.003 | 0.0038 | 0.0067 | tr(0.0021) |
四万十川河口 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd |
大牟田沖 | 0.04 | 0.01 | 0.01 | 0.004 | 0.003 | 0.004 | nd | nd | nd | tr(0.00096) | tr(0.00063) | tr(0.00059) |
博多湾 | nd | nd | nd | nd | nd | nd | nd | nd | nd | tr(0.0019) | tr(0.0018) | tr(0.0016) |
洞海湾 | 0.017 | 0.013 | 0.018 | 0.006 | 0.005 | 0.01 | 0.0051 | 0.005 | 0.0051 | tr(0.0025) | tr(0.0021) | 0.0080 |
伊万里湾 | 0.007 | 0.005 | 0.005 | - | - | - | 0.004 | 0.004 | - | tr(0.0025) | 0.0033 | tr(0.0021) |
長崎港 | nd | nd | 0.003 | nd | nd | nd | nd | nd | nd | 0.0068 | 0.0060 | 0.0064 |
大淀川河口 | 0.013 | nd | nd | 0.006 | 0.003 | nd | 0.005 | nd | nd | - | - | - |
五反田川五反田橋 | nd | nd | nd | nd | nd | nd | nd | nd | nd | - | - | - |
統一検出限界値 | 0.003 | 0.003 | 0.003 | 0.003 | ||||||||
検 出 頻 度 | 31/105 | 27/105 | 21/107 | 20/76 | ||||||||
最 大 値 | 0.042 | 0.014 | 0.009 | 0.0080 | ||||||||
最 小 値 | nd | nd | nd | nd | ||||||||
幾 何 平 均 | 0.0025 | 0.0021 | 0.0019 | 0.001 |
(注) | 1 TBTO換算値 |
2 ndは不検出,”-”は欠測、空欄部分は未調査。 | |
3 幾何平均値は、ndを各地点ごとの検出限界値の 1/2として算出した。 |