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J31JB/T752719941994-10-251995-10-01()112GB265GB601GB2684GB2794GB4472GB12007.5ZBJ3100631120mPas220g/cm33pH4%5%624hMPa44.14.1.1GB265–4.1.2GB27944.24.2.1GB12007.5–4.2.2GB44724.31994-10-25JB/T752719941995-10-01()JB/T7527199424.3.16HCHO+4NH4Cl+4NaOH=CH26N4+4NaCl+10H2ONaOH+HCl=NaCl+H2O4.3.2a250mLb50mL0.1mLc25mL10mL0.1mLd0.1mge1f10.1pH4.3.3GB601a0.5mol/Lb0.5mol/Lc10%de0.1%4.3.42.5~3.0g0.0002g250mL25mL10mL10%25mL0.5mol/L200.5h0.1%40.5mol/L250mLpH74.3.5y%1y=()10004503.0o××−mCVV1VomLVmLCmol/Lmg0.045031mL4.3.620%4.44.4.14.4.2JB/T752719943ab500mLc400mmd500mLe50mL0.1mL4.4.3GB601a0.05mol/Lbcd50%e4%f–0.1%20mL0.1%50mL4.4.40.1~0.8g0.0002g500mL0.2g10g10mL145°30min200mL50%50mL2500mL3~4mm4%50mL200mLpH64.4.5D%2D=()10001401.00××−mCVV2V0mLVmLCmol/Lmg0.014011mLJB/T7527199441212344.4.65%4.5pH4.5.1apH0.1pHbcd50mL4.5.2abpH4.0031102~3h10.21g1000mLcpH6.8641102h3.4g3.55g1000mLdpH9.182Na2B4O110H2O3.81g1000mL4.5.3a24hb0.5hc40mL50mLpH4.64.6.1JB/T752719945aSWYbNRJ–4113kgc8GB2684d10kge500g0.5g100g0.1gf4.6.2aZBJ31006bQB85–9–2470%4.6.3202202505%4.6.4a1000g7.5g1min15g1minb85671g10minc24hd24h4.6.554.6.610.0%4.6.44.6.7abcdJB/T75271994JB/T75271994*2100044*88012301/161/210,000199531995315003.00104