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《Chinese Journal of Analytical Chemistry》 1989-12
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SIMULTANEOUS DETERMINATION OF COMPONENTS IN A MIXTURE OF RARE EARTHS BY MULTIWAVELENGTH SPECTROPHOTOMETRY WITH REGRESSlVE-ORTHOGONAL DESIGN

Zhao Kaiyuan Sun Ruiyuan Wang Yuqing Zhao Huimin (Department of Chemistry,Hebei Teachers College,Shijiazhuang)  
in the RE-chlorophosphonazo Ⅲ system using multiwavelength spectrophotometry with regressive-orthogonal design a regressive equation is obtained.The relative standard deviation obtained with this equation is6%,and percentage recovery is 95—105%. The F-test shows that the regressive equation holds effective at a of 0.01 level.
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