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1、铁矿石中微量铜的测定方法研究(?+22?)2006?+3?;JournalofYuxiTeachersCollegeVol.22No.3Mar.2oo621.:.?s?c?.:.?z?c?a?J?5M?M5V(1.?o?)?s?f?;2.?2?g?K?u?Ula)?s?a?653100)4c?7?4h?;?;?z?4c?4l?q?z?a?-?y?U(BCO)?fCue5g?X?a?S?f?q?E?y?z?5g?+?u?q?/?:?-OH?Fe?a?k4(A13?k?a?-pH?L?P8.5-9.3?n?CUZ+?fBCO?q?X?.?c?:?/?f?3?a?z?;?a?+?s?z?.?3?4h
2、0657?7?J?(A4c?s?4l1009?9506(2006)03?0021?04?z?3?.?a?K?u?4(?3?y?y?y.?z?/?/?4(?l?%4(?3?8?a?l?E?z?s?.?3?y?y?w?-?3?a?3?;?a?a?c?a?e?.?3?y?y?K?uBCO,BAO,DDTC?IDTC?y?a?a?E?-4(?;?BCO?3?y?y?.BCO?3?y?y?9?-?y?U(?BCO)?fCue?k?X?a?S?f?-?3?y?y?q?z?=?3?.?BCO?3?y?y?3?=?f?a?a?-?4(?y?a?-pH?L8.5-9.3?-?8?-?a?y?r,(BCO)?fC
3、ue?k?x?(1:2)?o?a?615nm?0?z?E?y?a?;?z?Z?.?-?t?n?-?F?8?P?:F?=?a?8?8;F?X?l?I?a?E?y?z?.?P?Z?z?K?5?Fe3+,A13+?y?a?-?u?q?f?_?x?C?+?BCO?o?l?I?a?z?u?l?f?X.?P?a?c?6?q?c?a?-?n?F?U?q?/?:F?-?8?s?8?=?q?;F?-OH?3Fe3+,A13+?a?z?.?r?/?f?a?z?Y?a?E?s?.1?z?3?c?1.1?z?/?1?-?E?z?a?c?6?u?n?:?m?CaO,M?h?z?a?CaO,M?h?z?a?a?Ca0,M
4、gO?V?l?z?a?Z?u?8?4(?a?-?u?3?a?a?3?4(?f?z?a?V?a?z?.?-?q?z?a?-?a?=?:?4(?-?z?8?a?-?L?a?d?4(?a?q?z?a?d?.?Y.1.2?3?7?=?/?P?=?3?q?BCO?y?-?=?a?K?-:?m?s?S?a?8?sFee+?;?P?:?8?8?a?C?.?/?x?=?:?8?s?4(?s?y?l?a?e?a?a?8?sFe?a?f?a?s?a?,?-?8?e?)?.?g?:?-?8?s?8?=?q?8?a?a?s?=?n?.?,?1?J?F?S?>?;2006-01?154c?6?4l?(1957?)
5、?a?=?a?a?n?o?a?K?s?4(?s?.22?o?)?L?F?-?n?:3CuS+8HN03=?3Cu(N03):+2S+2NO+4H20Cu0+2HN03-Cu(N03):+H2OFe+4HN03?Fe(N03):+NO+2H203Fe2+4H5g+10N03?5g?3Fe(N03)2+NO+2H20?1?J?E/V7150064Fe3+/FeFe3+/Fe2+S/S2-N03?/NOFe3?k+3e?Fe?0.036Fe3+eS+2e-?Fe2+=S2-N03?+4H+3e?=NO+2H20?3?3?:?-?8?s?8?=?a?Y?f?a?8?s?.?a?3?=?/?P?=?a?
6、q?.1.3?-?3?<?3?1.3.1?4(?-?u?4(?q?3?y?y?z?P?K?:F?-?8?aCue+?u?u?x?X?i?a?Cue+?o?X?u?.F?u?i?Cue+?a?u?a?5?x?,?;.F?u?l?u?d?4?Fe3?k4(A13+?a?5?x?a?.?X?l?I?s?l?X?.F?e?-.?/?:?-OH?3?Fe3+,A13+?f?q?E?y?z?a?=?4?4(?y?.?g?:F?3?4(?f?a?w?a?X?I?a?u?9?z?.F?3?4(?PH?L?e?S?a?.F?Fe(OH)3,A1(OH)3?a?a?s?y?%?-?a?E?y?z?a?X?f
7、?X.F?z?Y.1.3.2?3?4(?3?6?s?;?z?a?2?:?2?7?b?s?LpH?LD1?l?K,p2l?pH?L?pH?LCMn+?0.01mol?L-CM+?1X10-1mol?L-1?pH?L?pH?LFe?k3.0x10-392.23.2Al1.3x10-4.05.27.810.8Cu2+1.3x10?205.26.7?3?3?:(1)Fe35V,Al5V?aCue+?.?U?a?PHH2O?-?n?a?-?f?w?w?:>_10.5?aCue?k?w?.(2)?-NH3?Cue+30H-Cu(OH)3=Cu(NH3)44h2+Ksp=1.3x10?20Cue+NH
8、3?I?E?3JK=2.09X1013?NH3H2O?P0.1mol/L,Cu(NH3)42?k?P0.01mol/L?a?V?,k=c(Cu(NH3)12?k)c(Cu2?k)xc(NH3)4?%?:c(Cu2+)=2.72x10?5V2mol/L?,Ksp?c(Cu2.)xc(OH?)5V?%?:PH=11.2:?z?c?23?:?.?Ksp?K?o?a?PH_11.2?aCu?a?k?w?.?)?4PH?L?.?Cu(OH),?a?t?3PH?L?A?L?S?-8.5?9.5?)?.?a?-?-?m?)?a?3Fe3+,A135g?a?fCue+?3?.2?z?u?=?z?2.1?K?7
9、21?3?y?y?2.2?K?%(1)HN03:1+1(2)0.1%?y?U(BCO)?:?1.0gBCO?500mL?a?20mL?m?a?-?60B)?m?r?a?200mL?9?m?a?-?l?6?n?z?a?f?a?(I+1)?1000mL.(3)pH=9?-?8?e?:?340g?s?u?500mL?m?a?-?m40mL?a?-?m?1000mL.2.3?c?a?z?(1)?:?-pH?L?P8.5?9.3?-?8?-?a?o?E?y?4?8?c?I?;pH?L?Y?8.5?a?o?X?l?;pH?L?8?9.3?a?o?U?.(2)?9?:?9?s?X?l?8?a?-?9?n?X
10、?I?.(3)?X?%?-?:BCO?-?-8.0?15.0mL?E?y?I?a?u?-10.0mL.(4)?X?:?X?x?a?-2h?z?I?l?U?.(5)?:A?615nn.(6)?:L=2cm.(7)?:?P?.2.4?S:?3?6?U?J?=(?Z?l?a)?a?u?=?z?q?a?z?E?y?a?SA-Cu%?a?s?,?%?n:Cu%=kA-b.?u?-?J?=?S?g?:?-?t?3?a?+?l?-?J?S?a?a?-?Z?J?=?S?a?=?a?=?p?a?3?;?a?a?z?A?L?a?,?r?3?Z?a?s?,?n?3?Z?.?z?)?:?+?2?-?Z?P0.001-
11、0.5%?=?z?.2.5?=?z?=?S?J:?u?=?=?a?m?4(?9?3?a?120?a?=?.?=0.100(4h?0.8000g(?/?=?Z?a?)?a?100mL?u?a?-?i?m?a?10mL1+1HN03?a?r?a?9?8?c?a?(?a?2?3mL?3?n?a?9.?10mL?m?a?8?-?a?n?9.?x?-?m?a?.?10mLpH=9?-?8?e?a?t?3?6?f?a?20?30min?a?50mL?a?-10mLpH?9?-?8?e?C?2?3?B.?10mL0.1%BCO?a?-pH?9?-?8?e?K?a?j?a?X?5min.?-?615nm?0?
12、a?u?2cm?a?m?P?a?z?E?y?L(A).?:(1)?r?Z?(Cu%).(2)?9?-?n?Z?:Cu%=kA?b(?:A?P?=?E?y?L).24?o?)?3?z?3?i?3?U?J?=?3?U?4?_?z?=?u?=?z?q?z?a?z?C?3.?z?f:?a?<?;0.002?a?p?o?J?k?a?3?Y?a?-?t?z?.?3?z?0?3?=?J?=10.0126?J?=2?J?L(%)?z?1(%)?z?2(%)?z?3(%)?z?4(%)?j?LX(%)0.?J?=30.03860.03770.03790.03900.03840.03830.00058?40
13、.02780.02640.0280?50.0452?60.03640.01340.01280.04420.04660.03720361?aJnU?0224222nU00000.0358027203600002650.02770.0.0356?J?S?(%)0.01200.01360.01300.00072+0.0004?0.002000820.00071?8?a5g0?4(?S?o?<?a1000000.?k?(%)?0.?)03?;0.002?0.4rX)06?0.002?;0(XX)0).002?0.000410.0023893?)202020200).00.(0000?/?;4a?
14、)?71?.?s?;?z?4xM.?C?:?s?.?d?X?a2005.24h?y?8?.?3?s?4xM.?C?:?y?d?X?a2000.3?.?s?_4cM.?C?:?y?d?X?a2000.DeterminationofTraceCopperinIronOreAIHua?finWANHong?jun2CAIYue?dongLINHong2.CentralKeyWords(1.DepartmentofChemistryandEnvironmentalScience,YuxiTeachersCollege;Laboratory,LiuzhongqiIronandSteelCo.Ltdoft
15、heCityofYuxi?aYuxi?aYunnan653100);ironore;tracecopper;determinationofcopperAbstract:Atpresent,theamountoftracecopperisdeterminedbyabsorbencyfollowingthewithCu.Thepaperputsforwardsomeimprovementmadeontheexistingmethod:removeFe3?kreactionofBCO?aandAlbyOH.-ionprecipitationandmakeCu2.reactwithBCOwithPHat8.5?9.3.Thismethod?aprovedtobereliableandquickindetermination?acansatisfytheneedoftracecopperdeterminationinaveragelaboratories.
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