Dish Drainer,Cutlery Holder,Kitchen Racks And Shelves,Kitchen Utensil Set With Holder ZHEJIANG ERHUI TECHNOLOGY CO.,LTD , https://www.jahhome.comUsing 2- (2-pyridylazo) -5-diethylaminophenol (PADAP) as the pre-column derivatization reagent in methanol-water containing 0.1% tartaric acid in 10mmol / L (pH3.5) acetic acid-sodium acetate buffer solution (50:50, V / V) (580nm detection), the simultaneous separation and determination of V, Nb, Ta on the C18 column within 11min, the detection limit (S / N = 3) is 0.34, 0.29, 7.30 ng / mL. The method has high sensitivity, and the results obtained for the analysis of ore samples are consistent with the recommended values, and the standard recovery rate is 99.0% -101.1%.
Reverse phase HPLC determination of 2- (2-pyridylazo) -5-diethylaminophenol complexes of vanadium, niobium and tantalum