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First Standard® 2,4,4′-三氯联苯
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First Standard® 甲醇中乙滴涕溶液,100μg/mL
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First Standard® 2,4’-滴滴涕
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First Standard® 苏丹红2号
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2,4滴
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First Standard® 2甲4氯
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Sodium 4-phenylbutyrate (Standard) | 苯丁酸钠(Standard)
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First Standard® 2,2’,4,4’-四溴联苯醚
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First Standard® 正己烷中2,4-滴异辛酯溶液,100μg/mL
2,4-Disooctyl ester Solution in Hexane, 100μg/mLFirst Standard®天津
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First Standard® 4-辛基酚-D17
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