kỹ thuật vô cơ ướt - khô kết hợp.pptx

8/10/2019 k thut v c t - kh kt hp.pptx

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MN LY MU V X L MU

K thut v cho kh - t

kt hpGVHD : Hong ThKim Khuyn

Sinh Vin : Phm Bo QuMSSV : 11050991

TRNG I HC CNG NGHIP TP.H CH MINHKHOA CNG NGH

HA HC


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www.themegallery.com

Ni dung

Nguyn tc chung

1

Cch thc hin v mt s v d

2

3

u im4

Khi nimxl mu

Nhc im,phmvi ngdng5


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Khi nimxl mu

Xl mul qu trnh chuynmuthnh dngc thphntch c bng phng php thch hp

C hai qu trnh xy ra ng thiPh hu cu trc ban u mu (digestion ofSample Matrix)

Ho tan gii phng cht cn xc nh v dngdung dch ng th


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Cc k thut x l mu


1

2

3

4

5

K thut v c ho t (x l t)

K thut v c ho kh (x l kh)

K thut v c ho kh - t kt hp

K thut chit (lng-lng, rn-lng, rn-kh...)

Cc k thut sc k...


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K thut v c hokh - t kt hp


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Nguyn tc chung


Mu c phn hu trong chn hay cc nung

Lng axt dng x l thng tn ch bng 1/3 hay 1/4lng cn dng cho x l t t tn axt tinh khit.

x l t s b trongcc hay chn nung

bng mt lng nh

axt v cht ph gia

em nung

nhit thchhp

Ho tan

tro mu


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X l mu rau qu xc nh cc kim loi (Na, K, Ca, Cd, Co, Cr,Cu, Fe, Mn, Ni, Pb, Zn)

V d

Cn 5g mu nghin mn

5 mL HNO3 45% 5 mL Mg(NO3)2 5%

sy, hay un nh n khi khthnh than en

dn

lc u 400-450 oC (3h)

ri nng ln550oC

n htthan en

Ho tan

tro

nung

thm 1mL HNO3

65%,

un nng

cho tan

bay hi ht

axit d

nh mc bng dd

HCl 2% thnh 25 mL

20 mL dd

HCl 1/1


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V dX l mu sa xc nh cc kim loi (Na, K, Ca, Mg, Cd, Co, Cr,Cu, Fe, Mn, Ni, Pb, Zn)

Cn 5g mu nghin mn

5 mL HNO3 45% 2 mL H2SO4 98%5 mL Mg(NO3)2 5% ( hay

KNO3)

n khi kh vthnh than en

dn

sy

lc u 400-

450o

C (3h)

ri nng ln

550o

C

n ht

than en

nung

Ho tan

tro thm 1

mL HNO365%,

un nngcho tan

18 mL dd

HCl 1/1

bay hi ht

axit d

nh mc bng ddHCl 2% thnh 25 mL


9/14www.themegallery.com

V dX l mu tm, cua, c,.. xc nh cc kim loi (Na, K, Ca, Mg,Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn)

Cn 5g mu nghin mn

n khi kh vthnh than en

dn

sy

lc u 400-

450o

C (3h)

ri nng ln

550o

C

n ht

than en

nung

Ho tan

tro thm 1

mL HNO365%,

un nngcho tan

18 mL dd

HCl 1/1

bay hi ht

axit d

nh mc bng ddHCl 2% thnh 25 mL

3ml Mg(NO3)2 5%8 mL H2SO4 75%


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uim

Kthutv cho kht kt hp th x l

t ban u l bov mt s nguyn t

cho x l kh tip theokhng b mt, khngphi ui lng axt d

lu hn ch snhim bn.

Kthutv cho kh c thlmmtmtschtdbay hi, nukhng thm chtphgia

Kthutv cho t phi uilng axt d lu sau khi x lmu gy nhim bn mu

Cch ny thch hp cho cc mu c nn (matrix) l cht huc, nh rau qu, thc phm,.., x l xc nh cc kim loi v mts phi kim hoc nhng phng th nghim khng c thit b l vi sng.


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uim

Xl kh - t kt hp u vit hn so vi x l t

S tro ho trit , sau khi ho tan tro cn li c

dung dch mu trong. Khng phi dng nhiu axit tinh khit cao tnkm.

Thi gian x l nhanh hn tro ho t.

Kh tkt hp

x l t Thi gian phn hu ko di Lng axt dng ho mu nhiu


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Nhc im phm vi ng dng


ng dng ch yu x l mu cho phn tch ccnguyn t kim loi v mt s anin v c, nh Cl-, Br-

, SO42-, PO43-,..trong cc loi mu sinh hc, mu mitrng, mu hu c v v c.

Nhc im:khng dng c cho x l mu xc nh cc cht hu c


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Ti liu tham kho


1. Ha hc phn tch- Nguyn Tinh Dung- Nh xut bn gio dc

2. Ha hc Phn tch nh lng- Bi Long Bin- Nh xut bn khoa hcV k thut

3. Gio trnh Ly mu v x l mu phn tch-i hc Cng nghip thnhph H Ch Ming


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kỹ thuật vô cơ ướt - khô kết hợp.pptx

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