Understanding the effects of potassium ferricyanide on lead hydride formation in tetrahydroborate system and its application for determination of lead in milk using hydride generation inductively coupled plasma optical emission spectrometry.

摘要: Absract To understand the formation of plumbane in Pb II -NaBH 4 -K 3 Fe(CN) 6 system, intermediate products produced reaction lead(II) and NaBH presence K were studied. The elemental lead measured through continuous flow hydride generation (HG)-inductively coupled plasma optical emission spectrometry (ICP OES) X-ray diffraction techniques, respectively. Based on experimental results, explanations can be depicted following steps: (1) black sediment (black Pb) are formed ; (2) is oxidized by to form 2 [Fe(CN) ], which further reacts with more Pb; (3) another round starts from step then continuously ] complex, would produce plumbane. In short, complex key for system. enhancement effect potassium ferricyanide ferrocyanide, a method was developed analyze milk HG-ICP OES technique. detection limit observed as 0.081 μg L −1 . linearity range found between 0.3 50,000 μg L correlation coefficient 0.9993. recovery determined 97.6% ( n  = 5) adding 10 μg L into sample.