TQ172 B 10070389(2014)0269-04

(150080)

Uncertainty evaluation of reference method for cement chloride ion content measuring

Liu Yingjian(Harbin Construction Engineering Research and Design InstituteHeilongjiangHarbin150080) AbstractThe chloride ion content in cement was mensurated by ammonium theiocyanate volumetric methodand the uncertainty was

evaluatedAnd mathematical model was established to analyse quantitively several parameters as measurement repeatability of uncer-

tainty componentsstandard titration solution volume consumption and sample mass etcthe combined uncertainty was calculated and

method to reduce uncertainty in experiment was put forward

Key wordsammonium thiocyanatechloride ionuncertainty measurementevaluation

0

GBT 1762008 ()Bs ENl962 2005(2 () JJF 1059--1999cNAscL O6 n

1

11

(c1) AgN0 ClAgC1 25() NH SCNAgNO 12

w(Cl-) 100

w(Cl)v0 mL mL

g1773AgNO mgmL500---~1]),AgNO mL

2

(A ) (B) (B)AgNO Cl Cl AgNO (B)AgNO (B) 1

w(C1)

1

3

31

69

()6

[ ] J l

5 I0=505 mL 1

1

[w(C1) ]= 5 10U[w(C1 16 10 05 )]= ==5

939103

w(Cl J}

32

321

A50mL01 mL Ol=005 mL () =

) ) _28910 mL

Ul(VoV1)= 1 )+ 1(V1)=40910 mL 322

(205) Ot2= AT=5 oCOd =2110 () = =505 mL =347 mL

uzOo)= =3-()610mL

2 )= =21Ox10mL

H2 V1)=2 )+ 2 )=37110mL

70

u(voV1)= ( )+ z ( ) 41110mL

u(Vo)= l )+ 2 (Vo)=289210 mL

U(V o- V1)

260102

u(Vo) 575103

Vo

3_3 331

FA214 01 mg() =

H1 m )==0058 mg

( ) ul(mz) ltl m)=,]u12(mt)+ 1 m2)=0082 mg

332 FA214

O05mgU2 m)005 mg 5000 g

( )=4Ulz(m)+ 2m)=0096 mg

19210s

34 AgNO cl T(C1)=M(Cl)xc(AgNO3)1773

341 C1 2005IUPACcl

M(Cl) 35453 gmol 0002 () = cl

[M(CI)]=00 02115510 gmol

J

u[M(C

1-)] 32610

M(Cl) 342 AgNO

f(AgN03)= m(A gN O3)

"f

5

k=2 u[(Cl)]=0001 562=0003 1

(0056~0003 1)

6

0003 l 50mL10mL A0050025

1GBfF 1762008[s] 2]JJFlO59--1999s

3]CNAS--GL06[s

4JJG196--1990[s] [5][J]

200514(5)7-10

( )( 20130314)

(7)

w(PzOs)

8 I2o

P 0 C S P 0 ( C SCP) P0 P O Ca OH c sCa Ca(OH) Ca(OH)

4

(1)

(2)

(3)P 0 CSBC SCP c sc sCaO CSw(P0 )4 Cs w(P 0 )