离子交换树脂光度法是将有色络合物的待测元素交换于离子交换树脂中,以树脂相直接于分光光度计上测量其吸光度,该法灵敏度高、选择性好,一般能测量10~(-8)M。分离、富集、测定于树脂相一步完成,是光度法的新技术,把灵敏度大大提高一步。兰州大学化学系易瑞士、张玉新两位老师提出了,用120—140目Cl型强碱性阴离子交换树脂0.3克在0.2NHCl体系中,搅拌5分钟,富集钼——澳邻苯三酚红络合物,于1毫米 Ion exchange resin spectrophotometry is the exchange of the analytes of the colored complex in the ion exchange resin to measure the absorbance of the resin phase directly on a spectrophotometer, the method of high sensitivity, good selectivity, the general can measure 10 ~ ( -8) M. Separation, enrichment, determination of resin in one step to complete, is a new technology photometry, greatly increased the sensitivity of one step. Department of Chemistry, Lanzhou University, Switzerland, Zhang Yuxin two teachers proposed, with 120-140 mesh Cl type strong base anion exchange resin 0.3 g in 0.2NHCl system, stirring for 5 minutes, the enrichment of molybdenum - a pyrogallol red Complex, at 1 mm