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Determination of Some Trace Metals in Environmental Samples by Flame AAS Following Solid Phase Extraction with Amberlite XAD-2000 Resin after Complexing with 8-Hydroxyquinoline
water and vegetable sample trace metal preconcentration amberlite XAD-2000 FAAS 8-hydroxyquinoline
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2007/12/19
摘要 A procedure for preconcentration of Mn(II), Fe(II), Co(II), Cu(II), Cd(II), Zn(II), Pb(II) and Ni(II) based on retention of their complexes with 8-hydroxyquinoline (HQ) on Amberlite XAD-2000 resin ...
Chocolate Authenticity Control Concerning Compliance with the Conditions for Adding Cocoa Butter Equivalents as Laid Down by Directive 2000/36 EC
chocolate authenticity cocoa butter equivalent triglycerides
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2014/3/17
Chocolate samples (22 in total, including 11 samples of milk chocolate) were bought from retail store in Prague
and tested for their CBEs contents in relation to the declaration of CBE addition on t...
非有机溶剂萃取催化光度法测定锰Mn(Ⅱ)-H2O2-EBT-PEG-2000体系
锰 非有机溶剂萃取 催化光度法 铬黑T 聚乙二醇-2000
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2010/3/23
研究了碱性介质中，利用锰(Ⅱ)催化过氧化氢氧化铬黑T的指示反应。用聚乙二醇-2000非有机溶剂萃取平衡控制反应时间和指示反应进行的程度。通过测量酸性条件下539 nm处聚乙二醇-2000相的吸光度，建立了非有机溶剂萃取催化光度法测定痕量锰(Ⅱ)的新方法。方法的线性范围为0.008 0～0.55 μg· mL-1，检测限为3.0×10-9 g·L-1，可用于铝合金、茶叶样品中锰的测定。