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BÀI GIẢNG CÁC PHƯƠNG PHÁP PHÂN TÍCH VÀ ỨNG DỤNG NGƯỜI SOẠN LÂM HOA HÙNG

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<strong>CÁC</strong> PHẢN <strong>ỨNG</strong> CHUẨN ĐỘ THÔNG <strong>DỤNG</strong><br />

Phản ứng tạo phức<br />

C+M → CM<br />

Phöùctan Phöc DD chuaån C<br />

‣ Thöôøng laø ligan EDTA<br />

Caáu töû caàn xaùc ñònh X<br />

‣ Haàu heát caùc cation kim loaïi<br />

(tröø caùc ion kim loaïi kieàm)<br />

EDTA dang daïng acid khoù tan trong nöôùc nöôc<br />

⇒ thöôøng duøng daïng muoái Na 2 H 2 Ψ<br />

(complexon III hay Trilon B) kyù hieäu<br />

H 2− 4− 2 Ψ hay Ψ .<br />

H Phöùc kim loaïi vôùi EDTA<br />

2 Ψ 2− + M n+ ⇄ MΨ n−4 + 2H +<br />

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