Các phương pháp phân tích hàm lượng sắt???

[nhatminhdang90]

Cho mình(em) hỏi việc phân tích hàm lượng sắt trong một mẫu nước có thể thực hiện bằng những phương pháp nào? Ngoài phương pháp Phenanthroline:24h_066:

[gaumit]

@nhatminhdang90

Cho mình(em) hỏi việc phân tích hàm lượng sắt trong một mẫu nước có thể thực hiện bằng những phương pháp nào? Ngoài phương pháp Phenanthroline:24h_066:

bạn vô và đọc kỹ những thread này trước khi post bài mới ha. phân tích sắt bằng phương pháp AAS - Diễn đàn Thế Giới Hoá Học

http://chemvn.net/chemvn/showthread.php?t=7006

http://chemvn.net/chemvn/showthread.php?t=9792

http://chemvn.net/chemvn/showthread.php?t=9792

http://chemvn.net/chemvn/forumdisplay.php?f=54

Mod: các bạn chú ý đọc kỹ tất cả các thread trong cùng chủ đề mà mình muốn hỏi trước khi đưa ra những câu hỏi mới các bạn nhé

[nhatminhdang90]

mình chỉ muốn hỏi tổng hợp các cách thôi chứ chưa cần tới phương pháp

[gaumit]

@nhatminhdang90

mình chỉ muốn hỏi tổng hợp các cách thôi chứ chưa cần tới phương pháp

ah, tổng hợp ah, thế thì có thể nói đại khái thế này ha: để phân tích sắt thì có các phương pháp sau:

• chuẩn độ(với bicromate hoặc permanganate)
• trắc quang(với 1,10-phenantrolin, hoặc salysilic acid)
• phổ hấp thu nguyên tử ngọn lửa
• ICP-MS, ICP-OES,
• Các phương pháp điện hóa(cực phổ, volampe hòa tan,…)
• sắc ký ion
• điện di mao quản
• XRF(huỳnh quang tia X )
• NAA(kích hoạt nơtron) và một số phương pháp không phổ biến khác, mình đã điểm qua một số phương pháp mà hiện nay trên thế giới cũng như trong nước áp dụng phân tích các kim loại trong bản hệ thống tuần hoàn nói chung (và sắt nói riêng) hy vọng đã đáp ứng được yêu cầu câu hỏi của bạn ha có gì có thể trao đổi thêm.

[culu]

Anh chị ơi? Giúp em với!!! Theo phản ứng oxi hóa khử Fe3O4 + H2 = Fe + H2O thì đương lượng của Fe3O4 = M(Fe3O4)/8 phải không anh chị hay là chia cho 8/3. Em đã nói là đương lượng của một chất tham gia phản ứng oxi hóa khử thì bằng khối lượng phân tử của chất đó chia cho số điện tử mà một phân tử đó tham gia phản ứng. Vậy mà tụi bạn cứ cãi em hoài à. Nhờ anh chị chuyên hóa chỉ giúp, em cảm ơn nhiều!!!

[bakero]

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mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:“Times New Roman”; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:“Times New Roman”; mso-bidi-theme-font:minor-bidi;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:“Times New Roman”; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:“Times New Roman”; mso-bidi-theme-font:minor-bidi;} .MsoPapDefault {mso-style-type:export-only; margin-bottom:10.0pt; line-height:115%;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} –> </style><!–[if gte mso 10]> <style> / Style Definitions */ table.MsoNormalTable {mso-style-name:“Table Normal”; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:“”; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:“Calibri”,“sans-serif”; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]–> Fe₃O₄ la 1 oxid kep FeO.Fe₂O₃, 1 Fe(II) trao doi 2 dien tu, 2 Fe(III) trao doi 6 dien tu de thanh Fe(0), do do Fe₃O₄ trao doi tat ca 8 dien tu, do do duong luong gam cua Fe₃O₄ = M/8. Mong cau tra da giai dap dc thac mac cua ban.<o:p></o:p>