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BÀI GIẢNG HÓA PHÂN TÍCH TS. GVC. HOÀNG THỊ HUỆ AN

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Complexon II (Chelaton A; Trilon A) : etylen diamin tetraacetic<br />

acid (EDTA), ký hiệu H 4<br />

Y, là phối tử có 6 càng<br />

Complexon III (Chelaton A; Trilon B) : muối dinatri của EDTA,<br />

ký hiệu : Na 2<br />

Y ; là complexon thông dụng nhất do có khả năng tạo<br />

phức với hầu hết ion kim loại<br />

H O O C - C H 2<br />

C H 2<br />

- C O O N a<br />

N a O O C - C H 2<br />

N<br />

C H 2<br />

C H 2<br />

N<br />

C H 2<br />

- C O O H<br />

Complexon IV : DCTA = acid<br />

trans-1,2-diamino-cyclohexan-<br />

N<br />

C H 2<br />

C O O H<br />

C H 2<br />

C O O H<br />

tetraacetic<br />

H O O C - C H 2<br />

N<br />

H O O C - C H 2

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