一、引言 在使用铬天青S分光光度法测定铝时,由于基体钛对铝的显色反应有较严重的干扰,必须进行分离或掩蔽。目前多数采用氢氧化钠沉淀分离钛、铜、锰、钒、铬、铁等元素后,于滤液中用铬天青S显色铝。此法在日常分析中,发现大量氢氧化物沉淀对铝有吸附现象,当温度较低时,晶状物堵塞滤纸细孔,难以过滤,操作繁琐,准确度差。 I. INTRODUCTION In the determination of aluminum using chrome azure S spectrophotometry, there must be separation or masking due to the more serious interference of the substrate titanium with the color reaction of aluminum. At present, the majority of sodium hydroxide precipitation separation of titanium, copper, manganese, vanadium, chromium, iron and other elements, the filtrate with chrome azure S color aluminum. This method in daily analysis, found that a large number of hydroxide precipitation adsorption of aluminum phenomenon, when the temperature is low, the crystal clogged filter paper pores, difficult to filter, cumbersome operation, accuracy is poor.