1、ICS65.080G20NY/s.Water-solublefertilizers-Determination of humic-acidscontent2010-12-23 2011-02-01 1itfi*tj1U)E*mHE$J.JlHt15:l:ij!IJ)EmlmE.1tlf)E!iJt:/J!0*tjftmrf*f!If*mHE$J.9=mfftml15:I:ij!IJ)E02mttslffl:cf-t:rjtl)(1fxifr*)(1fJ.llm16PJoLiEJ:jfijiJlm)(1f,RiEJ:jfij#li*mr*)(14:0LiEJ:jfij iJIm)(14:,;tt
2、iUilr#li*(g.jJSJ9f:ff 1!&1(!)mr*)(14:0GB/T 8170 fm1j)lU;fHllltm:;ftlU)EHG/T 2843 1tHEtz:&11t?HJT9=1itmtjft)Em,tjftm,iJt1tJJm;fnm1tJJmNY/T 887 f*HE$J.Wij!IJ)E3mtJ.liJt-fm9=mfftml:tEft1fr)E:l:m,Jt:1iBfftftml,ltiFf1?d1ft.rTm1mtl)EmMffrm9=o*mEm)E:I:-mlm.1tm9=:ffm,mlmftm)Em)EoiJtmsft,*iJt-f.1tooE.1tmm:I:
3、,rr.ili:ffm:I:,M*fUtJ1JiJt-ffftftml15:I:04 lit*,1*ft4*tjft9=J9fmiJtJ,7j(;ftlmWCifitJ,:tE*if!ijm;ftlWCifitJ:/J!at,J.ll14-%HG/T 2843)Eo4.1mlo4.2.,Ifto4.3.o4.4o4.5,*m1tJJ:f$*,*1.490gmr15:ff0.700g(4.4)100mL*m9=,WH*ffr*Jm 9=04.6m:c1/2(HzS04)J=2mol/Lo4.7tt.1tm:c(NaOH)=O.1mol/Lo4.8.m:c1/6(KzCrz07)J=l mol/L
4、o f$*(4.1)49.031g,mr500mL*9=(16atPJ:bomm,p,!p,)E.3I 1L,1iE?:J04.9mltjftm:c1/6(KzCrz07)J=0.2000mol/Lo f$*120C#t.3It1!mlftiJtJ(4.2)9.807g,m7j(mm,)E.3I 1L,1iE?:Jo4.10mltjft)Em:f$*ml(4.4)56 gmr600mL800 mLtil*9=,:boA20mLml(4.3),)E.3I 1L,!ltr*Jm9=*ffo mlm:tEl=(9=it.1t,-B!mlJtJ.lltj)EftiJet&omltjft)Emtj)E:
5、PJt*20.0mLtjftm(4.9),Jtr250mL.=:1FJmL9=,:boA 3mL(4.3);ftl,*mJ(4.5)3 5,mm(4.1O)m)E,*Jt:711jf*fJ,rr.mltjft)Emt&Cz0Af*A;(lHt.0Cz=CIVI(1)VzJ:.t9=t:C2-r!tf.tkfjtli$jJETHlEl9ll,tttW:1g.4ijJt(mol/L);Cl-mr!tJIfjtlrHflEl9ll,tttW:1g.4ijJt(mol/L);Vl-Jl(mUJIfjtlfHlEl9f*m,tttw:1g?lJt(mL);v2-i$jJEa;fTIUEI9.f.tkfj
6、tlfiftilEl9f*m,tttw:1g?lJt(mL)5iSl.H5.1Jj1lt1)(:Bo5.2j!H:.,m:4000 r/min,lJC:ff50mL!ft1!HIltz.ffiilm;_JLlf5.3tgm.;j(tHj:i1i!llPI:lis100C+2C 6 HJf.6.1iita9*,Hi11iIf*-F5bX?tJ6,Jl(ili100g,JtillJ!1Mm.3H:1l1Hm:l1:o.50mm fL1:2%iC:tm-F5b,PIJj:l1:1.00mm%iT),TEHt:l:S)?:j,flT1a,TEI9:B9=t;tilf*-F5bX1tZ9JJ6,illJ
7、!Jl(ili100mL,flT1a,TEI9:B9=t 6.2 iitj!3jfa9*,J.6.2.1 001*iitf$Jl(iJt-Fo.5g(1ifD 0.0001 g)T 50mL*f9=t,:bO;j(10mL,m$J.mt#J6fflJttl,fiftil$?tA100mL:S:mL9=t.JlrPJ*f9=t:bO;j(10mL,m!l1t.3 XO$?t:bOA1mL 1tfl*jfiftil(4.7),mt#Jtfif,A:S:mL9=t,m7j(JE,Tm?:j 6.2.2jf1*iitf$Jl(iJt-F 2g3 g(1ifD O.000 1g)100mL:S:mL9=
8、t,:bOA1 mL1tfl*jfiftil(4.7)&Y:S:;j(,1t:?tfifJ6,JE Tm?:j 6.3iitj!3jfi:PJIUi.a9m1JEtl1ifD#Jl(:l:S)?:jiJt-Ffiftil5.0mL TJLlf9=t,:bOA5 mL r!tfiftil(4.6),Tm?:j;OJ(AJL,m9=t 3000 r/min4000 r/min EI9J!JL 10min(*fiftil9=tJ:ffI1ilf*n,$jj*JL,B;fraI1iIf*$m),f*J:?1ltilo6.4.a9.u.trPJJLlf9=t:boA5.0 mL mUJIfiftil(4
9、.8),tl:boA5 mL r!t(4.3),1tJLlfpgTmit:l:S)?:j JLlf;Oj(tElfJ:,fAiJ:ti4,flTMfEl97j(m9=t:bo 30 min,Jl(ili,!p,pg#250mL mL9=t,f*mm-:!1liIJtE 60mL80 mLo6.5jjIjrPJmL9=t:bOA 3i$j5 i$j$lljiUffijflJ(4.5),mr!tf.tkfjtli$jJEfiftil(4.10)i$jJEJEI9mUJI fiftilEl91H.:l1:Wm.-:ii-*tt,ep:lis,:tlO*i$jJEJ!JTiIUEI9f*mJJi$jJ
10、E:5!SJ!JTili*f*mE191/3 B;f,9ltlmYiJt-Ff$-F:S:,mJT?mJJE 6.6aiit:bOiJt-F7,Jtfi!.i1JiJt-FfiftilEl9?mJJEMX:5!siJtEI9i$jJEX;fffiO.06 mL a;f,/fPIJl(3l-:l:S)ffi,f-tA i.t0J:.t7 HJf.a9.nlfltU*:S:wl9J:I.:?t(%)ffi,tJ(J:.t(2Ht.:w=_CV_1_-_V_2_)c_D_X_1._7_24_X_0_._00_3_X_l_._43X100.C 2)mA;P:c-flit2:E31Jit.fIH)1UI
11、SIffkt;j$m?:IlfJ91Jt .!f!.m1-J.4i3tCmol/L);Vl-E3IJit.rJ1j.ijUISIffkt;j$m?:IlfJ9f*f,g.!f!.m1-Jtf3tCmL);V2-im-fIJit.rJ1jft.SIffkt;j$m?:IlfJ9f*f,g .!f!.m1-Jtf3tCmL);O.003-.!:31.00mLft.SIffkt;j$m?:IlcCFeS04)=1.000mollL;itifJ9ltR:7&ffifJ9fJ91OO:lbD-IJit-fm?:Ilfl9l1lfflJ!;1.724-1ffJL.1-Jlff11.1OO:fJ9 J!;1
12、.43-1tt3tiEJ!1.3.!:3_m.mJ!1.1ZJlf,g;m-fJ91OO:.!f!.m1-Jj.Cg)0*h*fJ9.*1-J*.*m=mJ!*o8.1ei!f.h*fJ9;iti*7&lfJ9*o1MtiUlUt1i?Ht.%5.005.00.*.%2010tt:*,*,JgPi9?XOOJ:i:m*,.!3inXOOJtm:t5JmzIt,rfiJ0*fJ9;iti*7&2fJ9*o2MtUUt:ll:?tIlc,%5.005.00*,%30209 J.l.1Ia9.?:Ilf*HE$l-_mll*:ft pC_mil)I;,1OO:ft1JtCg/L)7&ffirltA;C3Ht-=:pC_mil)=lOwp(3)A;P:w-fP _mllfJ91OO:ft*J!.!f!.m1-Js*.$C%);p-7ilf*-ffJ9*1Jt.!f!.m1-Jj.4i.3tCg/mL)0*1JtfJ9imrltNY/T 887fJ91Aho*m=mJ!*o
