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二氧化硅,7631-86-9,纳米粉末,规格表面积175-225 m²/g(BET),99.8% trace metals basis
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硅胶薄层层析板 含荧光指示剂 含多种规格片 25 Glass plates 20 x 20 cm,
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月旭 Welchrom® NH2,5g/60ml,10pk00509-11042 NH₂ 硅胶基质
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月旭 Welchrom® NH2,5g/30ml,10pk00509-11035 NH₂ 硅胶基质
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莱伯帕兹EZsep AL-N 5g/20ml 20/pkgSPE 固相萃取柱
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莱伯帕兹EZsep C18 5g/60ml 10/pkgSPE 固相萃取柱
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苝-3,4,9,10-四羧酸二酐,128-69-8,98
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晕苯,191-07-1,95
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试剂PFTBA,5GR,用于GCMS-QP2020/2020NX
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多环芳烃混标PAH-Mix9-(US EPA 16),200ug/ml each component in Acetonitrile, analytical standard
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