机构地区: 广东工业大学轻工化工学院化学工程系
出 处: 《广东工业大学学报》 1997年第S1期56-58,共3页
摘 要: 在0.24~0.42mol/LHCl介质中,研究了17种络合剂对锆(Ⅳ)-m-NPF-CTMAB显色反应的影响。除乳酸、甘露醇、α-羟基异丁酸、氧代戊二酸和柠檬酸外,其余络合剂都使体系的吸光度降低。有乳酸和甘露醇存在下,有色络合物的表观摩尔吸光系数为1.30×105L·mol-1·cm-1。Zr(Ⅳ)在0~10μg/25mL符合比尔定律。方法用于铝合金中微量锆的测定,结果满意。 In 0 24~0 42mol/L HCl medium,effects of 17 complex reagents for colour reaction of Zr(Ⅳ)-m-NPF-CTMAB system were studied.In the presence of these complex reagents,absorptivity of colored complex is redcxuced.except for lactic acid,mannitol,α hydroxy-isobutyric acid,ketoglutaric acid and citric acicl.In the presence of lactic acid and mannitol,apparent molar absorptivity of colored complex is 1 30×10 5L·mol -1 ·cm -1 .Beer′s law is obeyed in the range 0~10 0μg/25mL for zirconium.The proposed method has been applied to the determination of trace zirconium in alloys with satisfactory results.