ժҪֱԸˮpHֵ絼ʡؿźڲдڵļϸķýˮ絼ʻpHֵļһԶƼӰȷԵķ
ؼʣ糧ˮӰpHֵԶ
0
ŵҵķٷչ߲ٽ硢ٽͶ߲ԻѧˮƷʡҩƼˮƽҪԽԽߣˮලˮƽ߷ȷԣѧҩˮƽʹˮƷʹУDZ֤ˮϵͳͷֹεҪڣԻİȫҪá
ԳˮΪˮĸ߲¯УüӰڸˮpHֵѳΪҹ糧¯ڸˮpHֵ㷺ʹõķGB/T 121451999鼰豸ˮй涨¯У¯ѹ12.718.3 MPaҪˮ絼ʣӽ25 棩0.3 S/cmpHֵΪ8.89.325 棬ͭϵͳpHֵΪ9.09.525 棬ͭϵͳӰĶֱӰˮpHֵĴСøˮpHֵƼӰֱӡЧãʵУøˮpHֱֵӿƼӰصӰ졣
1ˮpHֵʵʲдڵ
11ˮpHֵľ
ʵоָˮpHֵڲʱԵѱ֤ȷԣԭڣ߲¯ˮˮʽϴ絼ʡ5S/cmʱˮӽھԵ壬ˮ缫ĦھԵ֮Ħɲɣʹ缫λEbͲαȵ缫λEc仯ھɵãڲвˮpHֵصġErErӵźϣһDZˣpHֵ25 ʱ־ɲĵλÿ仯5.916 mVpHֵͻ0.1ʵУʱɵĵλɴXʮɴɺܴpHֵ
ڴˮĦľ⣬ԲȡؿɿӵأĦIJ־ͨߣԼĦͬʱڱ֤DZˮ£ܽͲٲʹȶϷֻܼٴˮȫ Ѱȫʦվղؼ
12¶ȶpHֵӰ
pHֵIJڵλʽڷDZ״̬²ˮpHֵصIJλ˹طʾ
E=E0+0.198 4 T lg a/n 1
ʽEصIJλmV
E0缫ĤλڳҺλαȵ缫λۺϵλmV
0.198 4 T lg a/nҺpHֵжӦϵĵλmV
˹ط̶¶T
dE/dT=dE0/dT+ 0.198 4lga/n+0.198 4Td lga/n dT 2
dE/dTΪ¶ÿ仯1϶λı仯dE0/dTΪ缫ıλ¶ϵʾ缫缫ĤϡڳҺαȵ缫ȵ¶йأͨв
0.198 4lga/nΪ¶ϵбn=1ʱ¶ÿ仯1 棬бʱ仯0.198 4 mVn=2ʱбʱ仯0.099 2 mVͨȫ
0.198 4Td lga/n dTΪҺ¶ϵҺӻȡƽⳣйءҺӻȡƽⳣ¶ȱ仯ˮвͬɶ仯ȷģͨв
¶Ȳķȫ¶ȶˮpHֵɵʵУˮָ25 ʱpHֵƫ25 ʱֵһ˱ϸˮ¶25±2 淶Χڡ
13УpHֵӰ
pHƵı궨һ㷨һpH6.86pH9.18pH4.0125 棩ҺжλȻһpH9.18pH6.86pH4.0125 棩Һб궨бʡ缫һֱҺУȶһʱ缫Һһȶĵ缫λ缫λﵽģǾһʱ䣬ﵽȶĵ缫λֶ궨DZڱ궨ʱ缫ڱҺпʱԳЩʹ缫λȶٱ궨DZԶ궨DZ2궨ʱй̶ƣݵλ仯Զѡȡ2ĶӦĵ缫ܴӦʱϳĵ缫缫λδȶͽж궨ܴ
14缫Ӱ
ĿǰpHֵʱò缫ڵ缫ĤϡȡԵԡ칤յصӰ죬ͬһĵ缫ҲȫͬҲӰˮpHֵȷԵ֮һ
15ˮpHֵɵӰ
ڸˮpHֵܴˮɡ¶ȡšУ缫صӰ죬ǴˮɵӰȫų˺ѱ֤ˮpHֵȷԡ
¯У¯ѹΪ12.718.3 MPaͭϽĸˮϵͳҪƸˮpHֵ8.89.325 棩ΧڡˮpHֵƷΧΪ±0.525 ʱֻҪ5.916 mVpHֵƷΧھͻ20%øˮpHֵΪӰźžֱӡЧãʵӦһѶȡ
ʵʸˮˮpHֵ9.3ֵС9.3УͭͭƵѹͭĸʴܽ⣬ʴϵͳӾֻĻΣֻЧʵĽ͡pHֵճͭܵİʴʹй©֮ʵʸˮˮpHֵС8.8ֵ8.8Уɸˮϵͳ豸ܵĸʴܽӾ磬丯ʴ¯Ӿˮڵijʴɹܵ¹ʡ
2ˮ絼ʵIJ絼pHֵĹϵ
21ˮ絼ʵIJ
Һڵ糡¶ǨʵֵġҺһ壬ڵ缫˼һĽѹĵźžŴõҺĵ絼ʡ絼ʱҺĵʱָˮиӵܺ͡絼缫2壨DZ缫ΪͲʽṹȽȶҲصĸš
⣬絼ͨҺ迹תΪźŶõģܴˮɵӰ죬ȷʴߡ
22ֲݺ¶ȵӰ
£ˮ絼ʡ0.3S/cm25 棩ӰˮpH8.89.3Χڣ絼ͨ16S/cmΧڱ仯ʱ絼ʽС缫漫ӰСֲӰϴԲõƵʵIJٷֲݵӰ졣 Դעᰲȫʦ
絼16 S/cmΧڱ仯絼¶ȵı仯Ϊֱߣ¶Ȳʽ3в
X25 棩=Xt /1 +£t-25 3
ʽX25 棩ˮΪ¶25 µĵ絼ʣ
Xtˮt ʱĵ絼ʣ
¡ˮ¶Ȳϵ
ˮ絼16S/cmΧڱ仯ʱ¿ȡ0.02/档
23ˮ絼ˮpHֵĹϵ
25 ˮ絼ʡ0.3S/cmʱˮеʶԵ絼ʵӰdzСˮӰˮΪҺǿҺĵʹˮ絼ʾֵʮʮ˸ˮ絼ʴСҪȡˮаŨȡˮаŨpHֵ͵絼֮ȷĹϵ
ݸˮ絼pHֵĹϵͨ絼ʼpHֵ
¹VGBŷޱòˮ絼ʷpHֵķˮpHֵ
24ˮ絼ʲȸߣƷΧ
ɱ1ԿͭϽĸˮϵͳˮpHֵ8.89.325 棩絼1.75.3 S/cmΧڱ仯絼ʿΪ±3.6 S/cm pHֵΪ±0.5 絼ʿƷΧpHֵ絼ʲȱpHֵȸߣõ絼ΪźŸ
3ˮӰƵĹϵ
ˮҲǼӰƵһҪָꡣ¯ˮˮӣΪָˮpHֵڿƷΧڣӰ֮٣ˮӰ١ͬĻ顢ͬϵͳˮĴСӰĹϵͬǶһĶӦϵΪʹˮpHֵڿƷΧУøˮźſƼӰͱָˮpHֵȷƷΧСʵʩıˡ
4ԶӰƼչ
ͨϷԿøˮpHֵƼӰֱӣǣˮpHֵӰضࡢpHֵƷΧС±0.5øˮpHֵƼӰʵʩѡĿǰͨźſƼӰеøˮΪźţˮ絼ʻpHֵΪźſƼӰڸˮС鸺ɱ仯ϵͳеڶ仯ˮpHֵѧģ鲻ͬ죬ҪȷźſƼӰľȡȷȲߡ ȫʦ
ĿǰйصλһֶܷDZֱӲˮĵ絼ʣ25 桢ˮȶ֤絼ʲȷǰ£аѵ絼ʻpHֵĹܡDZͷϿͬʱʾˮ絼ֵpHֵøˮ絼ΪźŵͬʱԼˮpHֵͭϽĸˮϵͳ絼һ1.75.3 S/cmΧڣ25 ˮpHֵ8.89.3ΧڣpHֵԣ絼ʱpHֵƷΧҪ⣬ˮ絼ʵIJpHֵӰҪ٣ȷȸߣøˮ絼ʺpHֵĶӦϵͨˮ絼ʲźſƼӰʹpHֵ8.89.3ΧڣƼҩʱȷ侫ȺȷҲߡ