Lan dau tien chiing toi nghien ciiu su tao phuc cua Fe(III) vai PAN trong dung djch nuac da thu duoc cac ket qua sau:
1. Phuc Fe(lll) - PAN duoc hinh thanh tot nhat trong khoang pH = 6,0 - 8,0 Fe(III) 1
ben vai thai gian, co thanh phan phuc = - , X^,, = 565 nm, he so
PAN 2
hap thu phan tu gam la 27.375, tuan theo dinh luat Beer trong mot gioi han rong. Phuc con bi chict dinh lugng bang cac dung moi huu ca. Vi \ay, sii dung phuc Fe(III) - PAN de xac djnh vi luong sat.
2. Da nghien CLTU ca chc phan ung tao phuc cua Fe(III) vai PAN. Fe(III) di vao phuc a dang Fc \ PAN tham gia vao phuc a dang PAN . Phuc lao thanh khong bi hap thu tren anionit nhung bi hap thu yeu tren cationit, co phd hap thu trong cac clung moi huu ca khac nhau, khac nhau vc cue dai hap thu va cuang do hap ihu.
Da de nghj cong thiic cau lao co kha nang nhat ciia phuc tao thanh va tmh toan hang so khong ben ciia phii'c.
3. Phuc mau ciia Fe(Ill) \c')i PAN da dugc su dung de xac dinh ham lugng Fe(III) nu6c gieng khoan \'a trong nuac cat 1 lan trong phong thf nghiem. • Ham lugng Fe(IlI) trong nuac gieiig khoan la (0,63 ± 0,07) |.ig/ml.
• Ham lugng Fe(IIl) trong nuac cat 1 lan la (2,79 ± 0,03) |_ig/ml/25 ml.
59
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