CRCU

Chemical Research in Chinese Universities ›› 1985, Vol. 1 ›› Issue (1): 47-52.

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Spectrophotometric-Complexometric Titrations(Ⅲ)--The Titration of Micro-quantities of Titanium (Using Benzilic Acid as Masking Agent)

Chen Yongzhao(Chen Yungchao), Qin Ruolan, Chen Huanguang, Qin Ruolan   

  1. Department of Chemistry, Zhongshan University, Guangzhou
  • Received:1984-02-07 Online:1985-06-24 Published:2011-09-07

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Abstract: When DCTA is used as the titrant,benzilic acid is a specific masking agent for Ti (IV).Using the DCTA-benzilic acid masicing method and spectrophotometric end point,90 ppb of Ti can be [selectively titrated.Micro-quantities of Ti in quartz samples can be accurately titrated without prior seperation.We have found that malonic acid is a specific masking agent for Al.When it is used simultaneously with benzilic acid,Ti and Al or Ti,Al and Fe (II) can be titrated stepwise.