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Citation: Yang Dingguo, Wu Yunping. STUDY ON THE COLOUR REACTION OF BERYLLIUM WITH CHROMAZUROL B (CAB) IN THIE PRESENCE OF MIXED IONIC-NONIONIC SURFACTANTS[J]. Chinese Journal of Applied Chemistry, ;1987, 4(3): 64-66. shu

STUDY ON THE COLOUR REACTION OF BERYLLIUM WITH CHROMAZUROL B (CAB) IN THIE PRESENCE OF MIXED IONIC-NONIONIC SURFACTANTS

Yang Dingguo ^, ,
Wu Yunping

1.
Department of Textile Chemistry, North-West Institute of Textile, Xi'an

Corresponding author: Yang Dingguo,
Received Date: 6 October 1986
Available Online: 25 December 1986

A sensitive method for trace determination of beryllium is developed. In a buffer solution of pH5.5 of (CH₂)₆N₄-HCl and in the presence of emulsifier OP and sodium dodecyl-benzene sulfonate (SDBS) Be(Ⅱ) forms a purple complex with chromazurol B(CAB). The molar absorptivity coefficient of the complex is 8.55×10⁴ (605-610nm). Beer's law is obeyed with concentration of beryllium ranging from O to 2.5μg/25ml. The composition of the complex was estimated as Be(Ⅱ):CAB=1:2. The method has been applied sactisfactority to the determination of Be in minerals.
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