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环境检测实验 PowerPoint PPT Presentation


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环境检测实验. 实验一 水中六价铬的测定 实验二 城市环境噪声的监测 实验三 挥发性酚类的测定 —4- 氨基安替比林直接光度法 实验四 大气中氮氧化物 —— 盐酸萘乙二胺分光光度法 实验五 离子选择电极法测定饮用水中的氟 实验六 碘量法测定水中溶解氧 实验七 重铬酸钾测定化学耗氧量 ( COD ) 实验八 玻璃电极法测定水的 pH 值. 实验一 水中六价铬的测定. 一、实验目的 掌握比色分析方法,标准曲线的制作,显色及分光光度计的使用。 二、概述

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环境检测实验

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4589589


4589589

  • 4-

  • COD

  • pH


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  • 100


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  • DPC540nm


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110mm30mm

250ml

1

1202hK2Cr2O70.2829g1000ml0.100mg

2

5.00ml500ml1.00g

3

DPCC13H14N4O0.2g50ml100ml


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41+1

51+1

6

70.2%m/v

8ZnSO4.7H2O8g100mL2.4g120ml

94%m/v

1020%m/v

112%m/v


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  • 1

    1

    2

    2ml

    3

    4

    5Cr6+Cr3+PH85min


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2

850ml00.200.502.004.006.008.0010.00ml1+10.5ml1+10.5ml2ml510min540nm1cm3cm

350ml


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  • r=0.999

    mg

    vml


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1

2

3

4


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2


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A


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1

21.2


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500500

100250250


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6:0022:0022:006:00

8:0012:002:006:00

22:005:00


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5sA100(200)()


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1L10L50L90

L1010%

L5050%

L9090%


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10010L1050L5090L90

Li iL

n


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2

Ltt


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6:0022:001622:006:008

LeqL10L50L90L


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4-

1

2


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pH=10.00.24-5l0nm


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1

1L0.2g2000.5hNaOH


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2

1.00gC6H5OH1000mL

3-1/6 KBrO3=0.1mol/L

2.784gKBrO310g(KBr)1000mL

4(1/6K2Cr2O7=0.0250mol/L)

1800.4458g1000mL


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5Na2S2O35H2O0.0250mol/L)

16.2g0.4g1000mL

2

61%

lg100mL

7pH10

20g100 ml

pH


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82%M/V4-

4-C11H13N3O2g100ml

98%M/V

8gK3[Fe(CN)6]l00mL


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1

2502pH=4()5.0mL()225mL25mL250mL


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2

250mL1g40mL25.00mL5mL(1:5)5minlmL

(mol/L)

C(Na2S2O3.5H2O)=0.0250V/V1

Vml

V1(ml)

0.0125mol/L


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3

10.00mL250mL90mL100mL10.0mL 0.1mol/L-5mL10min1g5min0.0125mol1mL


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V1 (mL)

V2(mL)

V(mL)

C(mol/L)

15.681/6C6H5OH(g/mol)


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4

1ml100ml0.010mg


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5

850mL00.501.003.005.007.0010.0050mL50mL5mL50mL0.5 mLpHl0.00.24-1.0 mLl.0 mLl0mim510nm1cmmg

(mg)


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M (mg)

V(mL)


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1

2


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10mL

0~1L/min

10


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1

5.01000mL50mL900mL0.050g2

2

41


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3

20~40(1:2)(1:20)105


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4

0.1500gNaNO224h1000ml0.1mgNO2-3

5

5.00mL100mL5.0g NO2-


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5.00mL0.2~0.3L/min6L


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1

710mL


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15min540nm1cm

2

15min1cm540nm


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Y=bx+a

YA-A0AA0

xNO2-

ba


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A

A0

ab

Vr25760

0.76NO2NO2


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1

2

3


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()EaF-

K

R8.314/

T

F96487


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()aFF25

E=K1-0.059lgF

K1

ELgFELgFE


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PHSJ4ACSBF1

100ml 7

50ml 11ml 110ml 2

100ml 7


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0.100M

4.19881000ml

(TISAB)

292.0g500ml1:1500ml5MpH,pH5.0~5.55N6N


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3pH=4.005pH

GR1.021g100ml

4pH=6.865pH

GR0.34gGR0.355g100ml


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53mol/LKClpHpH24h

6KCl


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PHSJ4A

mv15min


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10ml 0.100MNaF10mlTISAB100ml102M102103104105106M


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100ml106106105104103102MElg[F]


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50ml100ml10mlTISAB


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1.ElgF

2.F


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WF=F100/50.0MF1000

WFmg/L

MF


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dissolved oxygenDO


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MnSO42MnSO42


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  • 1.250ml300ml

  • 2.25ml10ml


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1

480gMnSO44H2O1000mL

2

500g300400mL150g200mL1000mL

31+5

20ml100ml

41%m/V

1g100mL0.1g0.4g


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50.02500mol/L(c1/6K2Cr2O7)

1051102h1.2258g1000mL

6

6.2g(Na2S2O35H2O)0.2g1000mL714d

250ml100ml1g10.00ml0.02500mol/L5ml1+5

5min1mlV

7=1.84g/cm3


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  • 11mL2mL

  • 22.0mL5min

  • 3100.0mL250mL1mL


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1

2Fe3+100200mg/L1mL 40%

3


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COD


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COD50mL(250m1)


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(50mg/L)

1(16K2Cr207=02500molL)

1202h12258 g1000mL

2

1485g(C12H8N2H20)0695g(FeS047H20)100mL

3[(NH4)2FeS04.6H20=01molL]

395 g20mL1000mL

4-

25L25g,l-2d(2500mL500mL5g)

5


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1COD

220V

30 min170-180()()

21000mL100mL

1000mL15mL-

10(

)151(30mgL

04g1000mL(

)


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  • 345mL250mL()l0mL250mL40mL15mL3


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4

VmL

5CODcr

C(molL)

Vo(mL)

Vl(mL)

V(mL)


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PH

PHPHSJ-4A


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PH

PH=-log a(H+)

PH

PHPHES


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EX

EX

ES

PHSPH

PHXPH

R8.3144[J/Kmol]

Tt+273.15

F96485C/mol


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t=25

25PH59mvPHPHSpHPHX


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PHSJ-4A100ml 3100ml 7250ml 3


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1KHC8H4O4PH=4.008

1.012g250ml100ml0.5mol/L

2NaH2PO4+ KH2PO4PH=6.865

0.3388g0.3533g100ml0.025mol/L0.025mol/L

3Na2B4O710H2OPH=9.180

0.380g100ml0.01mol/L


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1PH

PHSJ-4A

PHPH15


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2

PH=4.008+PH=6.865PH=9.180PH3mol/L KCl24hPH7.000PHPHmv


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3

3535PH


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PH=4.008PH=9.180

58.2(273+t)/298

t

mv/PH

E1PH=4.008

E2PH=9.180

PH1PH2PH


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2PH


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1PH

2


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