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1、GB 6920-86 PH11.1pH1.2pH V 1pH 10pHC2pHx1KC1HH2|ptEXpH XXpHSESUpH XpH S+Es ExF/RTIn 10 pHpHZ V pH V 12pH-Log10 C H y/mo1.dm3.02 C(H+H y11 3pH25C,1pH59.16pH44.14.1.1pH2 xlO-6S/cmpH6.77.3 4.1.2pHpHpH4.008 25 C)110130 C23KHC8H4O4 10.12 1pHpH6.865 25 C)110130 C23KH2PO4 3.388Na2HPO4 3.5331pHpH9.180 25 C)
2、Na2B4O7.10H2O 3.80g1L4.2pH1pH4.34.3.14.3.2124.3.34C4.4pHpH S21 pHmolmolkg 1 25 CpH1000ml25 C 3.5576.4g KHC4H4O8 25 C 3.77611.4g KH2C6H5o70.05m 4.02810.1g KHC8H4o40.05m 6.8653.388g KH2Po4+0.025m+7.4133.533g Na2HPO4 0.025m 9.1801.179g KH2PO4 0.008695m+10.0124.392g Na2HPO40.03043m 3.80g Na2B4O70.01m 1.
3、679lOH4o 0.025m+12.4542.092g NaHCO3+0.025 2.640g Na3CO30.0525 C 12.61gKH2C4O82H2O 1.5gCa(OH)2 110 130 C23 C02 54 3 C452pH S*T/C A B C D E A25CBm=0.05 nolkg 1 Cm=0.025molkg 1 Dm=0.025molkg l Dm=0.008695molkg 1 m 0.03043molkg-1 Em 0.01molkg-1 0 5 10 15 20 25 30 35 38 40 45 50 55 60 70 80 90 95 3.557 3
4、.552 3.548 3.548 3.547 3.547 3.542 3.554 3.560 3.580 3.609 3.650 3.674 4.003 3.999 3.998 3.999 4.002 4.008 4.015 4.024 4.030 4.035 4.047 4.060 4.075 4.091 4.126 4.164 4.205 4.227 6.984 6.951 6.923 6.900 6.881 6.865 6.853 6.844 6.840 6.838 6.834 6.833 6.834 6.836 6.845 6.859 6.877 6.886 7.534 7.500 7
5、.472 7.448 7.429 7.413 7.400 7.389 7.384 7.380 7.373 7.367 9.464 9.395 9.332 9.276 9.225 9.180 9.139 9.102 9.081 9.068 9.038 9.011 8.985 8.962 8.921 8.885 8.850 8.833 m55.10.1pHpH0145.2604 C677.1pH2pHpH3pHpH S0.1pH7.2pH8 pHpH *9).2).3*pH2.2113.23*10pH1.4111.667199.1249.2pH9.39.49.5pH9.6EDTA10abcdepH0.1pHf