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β-六六六标准溶液,319-85-7,analytical standard,50ug/ml in methanol
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δ-六六六标准溶液,319-86-8,analytical standard,50ug/ml in methanol:toluene(4:1)
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γ-六六六标准溶液,58-89-9,analytical standard,50ug/ml in methanol:toluene(4:1)
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Pesticides matrix spiking standard 农药
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alpha-六六六标准溶液,319-84-6,analytical standard,50ug/ml in methanol:toluene(4:1)
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p, p’-DDD标准溶液,72-54-8,analytical standard ,50ug/mL in Toluene:Methanol(volume ratio 1:4)
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Semi-volatiles matrix spiking standard EPA 州标准品
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水中氰成分分析标准物质,Covenan 50ug/mL,in 0.1mol/L NaOH
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VPH Calibration Mix 50 ?g/mL in Methanol
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艾杰尔CleanertQuechers50mL;Milk matrix, 50/Pk
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