Analysis of Micro Eiements in PJant(i)——Spectrophotometric determination of Micro-Molybdenum in Chilli
Wang Yuqing Li Tiancai ( Department of Chemistry )
Molybdenum is indispensable to plant-growth, although its content in plant is only 0.1-10 ppm. This paper studies the best conditions of determining molybdenum in plant with Phenylf'luorone-Tween 8o-Vitamin C systems and a key problem of the interference of Fe(Ⅲ) has been solved. Experimental results show that sensitivity and reproducibility of this method are better than that of KSCN-spectrophotometric method, and Molybdenum in plants at o.l-10 ppm range can be accurately determined without extraction and separation. Micro-molybdenum in Hunan-Chilli has been determined by the standard addition method in this system, and the relative standard deviation is 3.4% and the rate of recovery is 92-103%.