21.phân tích hợp kim cu

7/31/2019 21.Phn tch hp kim Cu

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GVGD: Ths Trn Nguyn An SaSVTH: L Th Thu ThyLp: DHPT5MSSV: 09121471

Trng i Hc Cng Nghip Tp. H Ch MinhKhoa Cng Ngh Ha Hc

Tiu lun mn hcPhn Tch Cng Nghip

Ti: Phn Tch Hp Kim ng

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Gii Thiu Chung VHpKimng1

Cc Ch Tiu Phn Tch2

Quy Trnh Phn Tch3

Ti liu tham kho4

Ni Dung

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Click to edit Master subtitle style

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Gii thiu chung v hp kimng

ng thanh l hp kim ca ng

vi nhng kim loi mu khc tr

Zn.

ng thau l hp kim ca ng

vi Zn.

Hp kim ng c bit c nhng

tnh cht c l c bit dng trong

cc thit b o, thit b in..

Ta xt ch yu ngthau v ng thau a

nguyn.

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Chtiu1 Ch tiu 2 Ch tiu 3

Cc Ch Tiu Phn Tch

Xc nh Hm

Lng ng BngPhng Php inPhn (Theo TCVN5915 1995 ISO1554 1976).

Xc nh Hm

Lng PhotphoBng PhngPhp Quang PhMolipddovanaadat(Theo TCVN

5924 1995 ISO4741 1984).

Xc nh Hm

Lng Niken(Hm LngThp) (TheoTCVN 5916 1995 ISO 1810

1976).

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Quy Trnh Phn Tch Hm Lng ng

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v

Phm vi p dng:Phng php in phn xc nh hm lng ng ca hp kim ng c

v gia cng p lc lm t hp kim ng km, ng nhm v ng

niken km.

v Nguyn l:

Xc nh hm lng ng bng in phn trong dung dch HNO2

floboric cha phn mu th.


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Quy Trnh Phn Tch Hm Lng ng

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Cn 2,5gmu

15ml H3BO3

2ml HCl

Dung dch 1

30ml HNO3

y np

Ra np v thnh ccNung 1h 90oC

ngui thm 50ml H2O

Dung dch 2

Cho dung dch NH3

Kt ta + HNO3 d Dungdch 3

Dung dchmang in

phn

nh mc300ml


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Quy Trnh Phn Tch Hm Lngng

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Nhng cc in cc(catot platin kiu Winkler v anot xon c lm

bng dy hp kim platin) vo trong dung dch trn v y cc li. Ta

in phn trong iu kin khng khuy vi mt dng l 0,6A/dm2

Khi ta thy dung dch bt u gim mu, th phi gim mt dng

xung khong 0,3A/dm2 v ra np, thnh cc v cc in cc. Tiptc in phn khi ng ngng kt hon ton.

Khi ht ng, khng rt in, ta nhanh chng thay cc ng dung dch

bng cc khc c cha 350ml nuc ct, in phn tip khong 15ph.


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Cng Thc TnhTon

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Trong :

m0: khi lng mu (g)

m1: khi lng ng ngng t (g)


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Quy Trnh Phn Tch Hm Lng Phtpho

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v Phm vi p dng:

Phng php ny p dng xc nh hm lng photpho t 0,0005

0,5% trong cc loi ng v hp kim ng.

v Nguyn l:

Ha tan mu th vi HNO3 v kh cc nguyn t gy nh hng bngcch cho bc hi vi HBr, HF, HClO4. Phn hy phootpho khng tan bng

cch cho nng chy vi Na2CO3


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Quy Trnh Phn Tch Hm Lng Photpho

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Cc PTFE

Cn 1g mu

10ml HNO3

0,5ml HCl10ml HClO4

+ 10ml H2O

+ 10ml HBrVi ml HNO3

+ 30ml H2Oun si 10ph

Thm 50ml H2O

10ml amoni molipdat I15ml isobutal

Lc k trong 30s

Lp li qu trnh 2 ln vi 5ml isobutanol

Gp 3 ln chit

Ra 2 ln vi 5ml H2O

+ 15ml SnCl2

Lc k trong 30s50ml

Loi b nc ly pha hu c

nh mc vi metanol


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Quy Trnh Phn Tch Hm Lng Phtpho

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o ngay bng quang ph k vi cuvet 1cm, ti 623nm. S dng hnhp 1 + 1 ca isobutanol v metanol lm dung mi so snh.

Lm mu trng vi tt c cc bc nh trn.


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Xy Dng ng Chun

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Cng Thc TnhTon

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Quy Trnh Phn Tch Hm Lng Niken

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v Phm vi p dng:

Phng php quang ph Dimethylglyoxime xc nh hm lng

Niken trong hp kim ng.

Phng php ny p dng xc nh hm lng Niken n 2,55%

trong mi loi hp kim ng.

v Nguyn l:

Chit Niken trong phn mu th dng phc Dimethylglyoxime mu

vng bng clorofom v tin hnh o quang bc sng khong405nm.


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1g mu 20ml HCl10ml H2O2

un si 1ph ngui dd

500ml

Ht 25ml dd nh mc

5ml HONH3Cl + 50ml dd phc

Chnh pH= 6,5 -7,23ml dimethylglioximeLc k dd trong 60s20ml clorofomLc k trong 40s

Cuvet 2cm


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clorofomNa2SO4 khan

Ta tin hnh o quang vi dung dich th v dung dich mu trng tibc sng l 405nm, iu chnh my quang ph v hp thu bng 0

ng vi clorofom.

Lm tng t nh trn i vi mu trng, nhng khng cho phn mu

th. Chun b 1 cuvet cha clorofom nh sau:

Cuvet 2cm


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Xy Dng ng Chun

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Ht 100ml dung dich Ni chun cho vo bnh nh mc 500ml, nh

mc ti vch. Chun b 6 bnh nh mc 500ml, ht ln lt 0, 5, 10, 20, 30, 50ml

dung dch trn, thm 1g ng khng cha Ni, tin hnh ha tan nh

phn mu trn. Ht 25ml dung dch trn cho vo phu chit 250ml, thm 5ml

hydroxylammonium clorit v 50ml dung dch phc, tip tc tin hnh

nh phn mu.

Tin hnh o quang v xy dng ng chun.


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Cng Thc TnhTon

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Vi:m1 l khi lng mu (g).

m0 l khi lng Ni c trong phn mu th hiu chnh theo mu trng

(mg).


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Lu

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v

Nu d on hm lng Ni khong 0,5%, cn 1g mu.v Nu hm lng Ni khong 0,5 2,5% , cn 0,4g mu v cho thm

0,6g ng tinh khit khng cha Ni.

v Nu hm lng Ni d on qu thp, c kt qu chnh xc cn s

dng cuvet dy 4cm hoc o bc sng 365nm.


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Ti Liu Tham Kho

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1. TCVN 5924 1995 ISO 4741 1984.2. TCVN 5915 1995 ISO 1554 1976.

3. TCVN 5916 1995 ISO 1810 1976.

4. Phn tch kim loi, Khoa Cng Ngh Ha Hc Chuyn Nghnh

Ha Phn Tch, Chng 2 t trang 43 54.

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