23 6 2003 12 Metallurgical Analysis :1000-7571(2003) 06-0024 - 09 3, (, 130022) : (19982001), 147 :; :O657132 :A,,Cu 2 + 4,22 2, ph10 Cu + 2,2 2 (Bi2qu) (BPB) Cu(Bi2 qu) 2 BPB,, [13 ] BPB (19982001) Cu + [10 ],,, 22(42, ),,- [11, ], [12 max = 420nm ] 22(32 22,4,52 )252 (CTZADMB) 1,, [13 ] Cu Χ - CAS - CTMAB -, (DDTC) [14, ],, [4 ] [5,6 ] [7 ] - [8 ] Cu Β - SCN - - RhB - Cu, 1 [47,1578 ] [9,,, ] Chromogenic system 1 Table 1 Spectrophotometric of copper Condition of max (ph) / 10 4 (L mol - 1 cm - 1 ) (g/ ml) Cu 2 + - (DDTC) 815 420 111 0414, [4 ] Cu 2 + - DDTC 8 447 1138 0511, [5 ] Cu 2 + - DDTC 510 440-0018 [6 ] Cu 2 + - DDTC 815 420 511 0210 [7 ] :2002-10 - 17 : (1965 - ),(),,,,,, 104, 24
23 6 2003 12 Metallurgical Analysis Chromogenic system Condition of max (ph) / 10 4 (L mol - 1 cm - 1 ) (g/ ml) 1 Cu 2 + - A 10 514 3815 07, [15] Cu 2 + - S 515 626 616 012118, [16] Cu 2 + - S 510610 58315 111 0510,, [17] Cu 2 + - 22 1110 520 1616 0015,[18] Cu 2 + - meso2( ) [ T(42 317 410 3719 001056, [19] TMAP) P] Cu 2 + - 5,10,152( )2202 7 417 3518 00112 [20] Cu 2 + - 5225 [ 42(42 ) ]2 410 414 25 012110 [21] 10,15,202-22 252 510 530 3152 0110,[22] ( TTZAPN) Cu 2 + Cu 2 + - 52( H2 )282 412 550 4187 00164 [23] Cu 2 + - 22(22 )242 415 565 1112 0013 [ 24 ] Cu 2 + - 22[ 32(52 ) ]2 715 640 2813 00126 [ 25 ] 62 Cu 2 + - S 715 620 1219 0102210 [ 26 ] Cu 2 + - CAS - CTMAB - 815 610 13 00136, [ 27 ] Cu 2 + - N2 2N2( 512516 30014 2319 01080148, [ 28 ] ) Cu 2 + - (N,N 2 ) 5170 488 1109 0510 [ 29 ] Cu 2 + - N2 2N 2( 415 36515 1114 0108116,[ 30 ] ) Cu 2 + - 124 ( )24 222 ) 415 560 1312 00132 [ 31 ] Cu 2 + - 52(32 )282616 554 713 00164, [ 32 ] Cu 2 + - 52( )282(42 212 )2 7181118 615 5119 0016 [ 33 ] ( PANPAQ) Cu 2 + - 22(42 )252 415 520 5124 0018 [ 34 ] (ADA) Cu 2 + - 718 620 3185 0018 [ 35 ] Cu 2 + - 22( )252 710 562 4135 01112,[ 36 ] Cu 2 + - 52(22 )282610 620 7104 0018 [ 37 ] Cu 2 + - 12(22 23,52 )232[ 42 1110 540 1713 00136, [ 38 ] ( ) ]2 Cu 2 + - 42(22 ) 1015 505 5133 01 [ 39 ] Cu 2 + - 32( )22,62 6198 547 3174 0112 - [ 40 ] Cu 2 + - 22(2 2 )2 7 544 1153 0018,[ 41 ] Cu 2 + - 12(52 222 )22,72 515 570 414 0017 [ 42 ] Cu 2 + - 12[ (52222 ) ]22,72 813917 543-00108 [ 43 ] (52Br2PAND) - TritonX2100 Cu 2 + - 12 222(52 222 )282 7101010 653 4168 0114 [ 44 ] 23,62 (52NO 2 2PAH) Cu 2 + - H 3 PO 4 663 2188 0110 [ 45 ] Cu 2 + - 52Br2PADAP 9 550 1617 00132 [ 46 ] 25
23 6 2003 12 Metallurgical Analysis Chromogenic system Condition of max (p H) / 10 4 (L mol - 1 cm - 1 ) (g/ ml) 1 Cu 2 + - 22(52 21,3,42 )252 310 565 3103 0018, [ 47 ] (CTZAN) Cu 2 + - 72( )282 252 313 460 6104 02, [ 48 ] ( PAHQS) - Cu 2 + - 4 644 2165 00164 [ 49 ] Cu 2 + - 32 252 242 1010 515 4159 0018 [ 50 ] 222 Cu 2 + - 610711 570 12 00124, [ 51 ] Cu 2 + - 514 538 1615 00136,[ 52 ] Cu 2 + - 516 593 1116 00136 [ 53 ] Cu 2 + - - 516 570 5161 00128 [ 54 ] Cu 2 + - 514 560 8104 0016, [ 55 ] Cu 2 + - 514 562 1114 0018, [ 56 ] Cu 2 + - 615 560 1318 00126,,, [ 57 ] Cu 2 + - 415 477 113 0216 [ 58 ] Cu 2 + - meso2(42 ) 5192 416 1116 00112 [ 59 ] Cu 2 + - 5 - [ 42( 22 ) 410 413 34 0015 [ 60 ] ]210,15,20 Cu 2 + - 522[ 42( 42 ) ]2 57 41519 2317 00112 [ 61 ] 10,15,202(42 ) Cu 2 + - 1010 618-110410, [ 62 ] Cu 2 + - 215 560-0014 [ 63 ] Cu 2 + - (NHCM) 415 460 1164 02 [ 64 ] Cu 2 + - 812918 600-0122 22 [ 65 ] Cu 2 + - 415 500-0015 [ 66 ] Cu 2 + - PAN 12 560 1142 02 [ 67 ] Cu 2 + - PAN 615 560 3173 01042, [ 68 ] Cu 2 + - 1,52(22 252 )232 316 630 218 0110,, [ 69 ] Cu 2 + - 52[ 42(32N2 ) ]210,15,202(42 ) 4 418 42 0012 [ 70 ] Cu 2 + - 415 628 1193 0018 [ 71 ] Cu 2 + - (ASA pa) 510 598 1130 0210 Cu 2 + - I - - B,, [ 72 ] 8 10-3 mol/ L 570 1815 00124 [ 73 ] H 2 SO 4 Cu 2 + - B - - 1mol/ L 590 310 0100201012,[ 74 ] H 2 SO 4 Cu 2 + - PAN - I - 115 550 6115 00156,,, [ 75 ] Cu 2 + - (DPC) - CPB - OP 10 480 180 00104 [ 76 ] Cu 2 + - - 618 560 511 0016, [ 77 ] Cu 2 + - - 412 480 316 0014 [ 78 ] (CAA) 26
23 6 2003 12 Metallurgical Analysis 2,,, [79 ] 22(282 252 )212 282 23,62, [84 ] Cu Β - 2,2 2 - (BPB) 640nm, 550nm, BPB, 219 10 4, 0, 0148g/ ml 114g/ ml, [85 ] [80 ] ( PIF) - [86,524nm,582nm, ], p H612 - HCl,p H8915N H 4 Cl - N H 3 H 2 O, ( CPB), max = 600nm, 600 = 2174 10 4,Cu 2 + 0, = 1111 10 5, 0 614g/ ml Cu ΧBCO 0120g/ ml 1 3,1h, [87, ] EDTA - 52(5 222, Cu Χ, )22,42 (52NO 2 2PADA T), max = 510nm, 010125g/ ml, Cu Β [81 ], p H410610 -,,Cu Β 1 2, 519nm, 436nm, Cu Β p H110,, 0017g/ ml, [ Cu (SCN) 4 ] 2 -, 519,436 1154 10 5,, max = 587nm, max = 1168 10 6, N 2 [82 ] Cu Χ - 30mL/ min, 10min,Cu 2 + (DBO K2CPA), p H710 -, Ni 2 +, 3 4 1 2, 015560g/ L HCl Cu DBO K2, [88 CPA 1 2, ] p H10 NaOH,630nm, Cu Χ - 2,2 2 - (BPB), = 1149 10 4 BPB, BPB, (CV), CV, BPB, [83 ] 590nm, (BCO), Cu Χ - BCO, 590 = 1145 10 5, 0 Ni Χ - BCO, 014mg/ L, [89, Cu Χ - BCO 610nm, ],Cu Χ Ni Χ - BCO 580nm, 610nm, 680nm [ Cu ( SCN) 4 ] 2-27
23 6 2003 12 Metallurgical Analysis, 0610ng/ ml,,, max = 587nm,= 1168 10 5, 5, ng 001070g/ ml,,, [90 ],, [91 ], 5min,435nm, 2 System 2 Table 2 Catalytic kinetic photometric of copper Condition of max (p H) / 10 4 (L mol - 1 cm - 1 ) (g/ ml) Cu 2 + - KBrO 3 - B H 2 SO 4 557 0177 5121218 [ 92 ] Cu 2 + - KBrO 3-4 550 0103 0100,, [ 93 ] Cu 2 + - KBrO 3 - K H 2 SO 4 520 0142 112140 [ 94 ] Cu 2 + - KIO 3 - H 2 SO 4 530 01035 020,[ 95 ] Cu 2 + - KClO 3-314 505 (= 1165 10 6 ) 020 [ 96 ] Cu 2 + - H 2 O 2 - M H 2 SO 4 535 012 080 [ 97 ] Cu 2 + - H 2 O 2-913 560 25 0240 [ 98 ] Cu 2 + - H 2 O 2-415 570 0103 0116 - [ 99 ] Cu 2 + - H 2 O 2-710 440 18 2080 - [ 100 ] Cu 2 + - H 2 O 2-919 590-020, [ 101 ] Cu 2 + - H 2 O 2 - H 3 PO 4 500 2179 0100,, [ 102 ] Cu 2 + - H 2 O 2-418 590 1116 014120 [ 103 ] Cu 2 + - H 2 O 2-10 590 4144 024 [ 104 ] Cu 2 + - H 2 O 2 - H 2 SO 4 530 2151 048 [ 105 ] Cu 2 + - H 2 O 2 - R H 2 SO 4 590 410 06010 [ 106 ] Cu 2 + - H 2 O 2-415 626-448 [ 107 ] Cu 2 + - H 2 O 2-410 590 410 0600 [ 108 ] Cu 2 + - H 2 O 2-811 454 0152 0116, [ 109 ] Cu 2 + - H 2 O 2-312 624 9165 038, [ 110 ] Cu 2 + - H 2 O 2-910 615 0136 020 [ 111 ] Cu 2 + - H 2 O 2-515 420 015 015100, [ 112 ] Cu 2 + - H 2 O 2-918 420 0122 01520, [ 113 ] Cu 2 + - H 2 O 2-45 440-01820, [ 114 ] Cu 2 + - H 2 O 2 - H 2 SO 4 540 0136 228 [ 115 ] Cu 2 + - H 2 O 2-515 480-0240 [ 116 ] Cu 2 + - H 2 O 2 - CAS 318 600-040, [ 117 ] Cu 2 + - H 2 O 2-510 520 0116 080 [ 118 ] Cu 2 + - VC - 01050109 0166-028 [ 119 ] mol/ L H 2 SO 4 Cu 2 + - VC - HCl 505 0101 04 - [ 120 ] Cu 2 + - VC - 510 540 4153 018418 - [ 121 ] Cu 2 + - VC - 414 538 01004 0112 [ 122 ] Cu 2 + - VC - H 2 SO 4 490 015 036 [ 123 ] Cu 2 + - VC - 4 555 01077 0115, [ 124 ] Cu 2 + - VC - 812 523-0516, [ 125 ] 28
23 6 2003 12 Metallurgical Analysis System Condition of max (p H) / 10 4 (L mol - 1 cm - 1 ) (g/ ml) 2 Cu 2 + - VC - H 2 SO 4 502 0166 028 [ 126 ] Cu 2 + - VC - B 510 530 01035 0210 [ 127 ] Cu 2 + - VC - K 5 530 0101 0110 [ 128 ] Cu 2 + - VC - 515 586 01048 016 [ 129 ] Cu 2 + - VC - H 3 PO 4 660 01015 00196 [ 130 ] Cu 2 + - NaNO 2 - R 10 530 25 032 [ 131 ] Cu 2 + - - SF 415 635 614 0124, [ 132 ] 6, Cu 2 +, 113 10-6 g/ L, 410 10-6 610 10-3 g/ L, RSD 314 %, 1min,, [133 ] Cu 2 + 22(52 222 )252 ( 52Br2PADAP), 717, [138, ] 12, [ (52222 ) 22,72 (52Br2PADN) [134 ] 4,4 2, TritonX2100, ( TEDA T) Cu Β, (NL PL S) Cu 2 +,, p H415 HAc - NaAc, 500nm, 00180g/ ml, 90 / h,, - CTMAB - [135 ], - Cu, Ni, Cd, Zn [139 ] [140 ] Cu - 52Br2PADAP - OP 0105, K 1105mg/ L, 20g/ L, 36 / h,,lu 3 + CN -, 7 Ni 2 +,Zn 2 +,,, Cu K, -, p H 517, 530580nm, 5nm [136 ] Cu Χ - 1,602nm 11, - - G250 00164g/ ml,00156g/ ml,0 0180g/ ml, RSD 0159 %4195 %, [141, p H1016 KOH - H 3 BO 3 95 %105 % ], 0100501100mg/ L,,, (MCM), 010015mg/L, RSD = 316 % ( n = 10 ), [137 ] Lu 3 +,CN - 52Br2PADN, TritonX2100,,p H910 H 3 BO 3 - KOH, 29
23 6 2003 12 Metallurgical Analysis Cu 2 +,Ni 2 +,Zn 2 + 9517 %,9212 %10218 % ;, 0 0172g/ ml, 0 0164g/ ml,01128g/ ml 22(52222 ) 52 (52Br2PADAP),CCD, - [142 ], : 00140g/ ml, 01020160g/ ml ; : 0102g/ ml, 0105g/ ml ; : 9313 % Fluorescent system 219 %710 %, 8,,, 3 3 Table 3 Fluorophotometric of copper Condition of ex / em (p H) Detection limit (ng/ ml) (g/ ml) Cu 2 + - 52 418 365/ 550 214 0320 [ 143 ] Cu 2 + - 52(22 )282 712818 284/ 380 0104 015 [ 144 ] Cu 2 + - 3,52 242910 393/ 510-71681024 [ 145 ] Cu 2 + - 612812 530/ 560 012 080, [ 146 ] Cu 2 + - 52(42 )282 715 327/ 368-01150,,,,,, [ 147 ], [ 20 ] 1 [J ],2000,20 (1) :81 : [ 1 ] 1 [J ],1996,12 (6) :3341 [ 2 ] 1 [J ],1997,13 (1) :281 [ 3 ] 1 () [J ],2000,36 (10) :4741 [ 4 ], 1 [J ],1999,6 (7) :641 [ 5 ] 1 [J ],1998,18 (4) :411 [ 6 ], 1 [J ],2001,21 (2) :71 [ 7 ],,,1 [J ],1999,6 [ 28 ] 1 () [J ],2000,36 (2) :681 (8) :581 [ 29 ] 1 [J ],2000,28 (4) :5251 [ 8 ], 1 () [J ],2002,38 (2) :831 [ 9 ], 1 [J ],2000,23 (1) :541 [ 10 ] 1 ( ) [J ],1999,19 (1) :321 [11 ] 1 ( ) [J ],2000, (1) : 361 [12 ],,,1 [J ], 2001, 29 ( 1) : 1141 [ 13 ] 1 ( ) [J ],2000,22 (1) :441 [ 14 ] 1 () [J ],2001,37 (4) :1821 [ 15 ] 1 () [J ],2001,37 (6) :2471 [ 16 ] 1 [J ],1999,25 (4) :761 30 [17 ],,,1 () [J ], 1999, 35 (3) :1261 [ 18 ], 1 [J ],1999,21 (5) :2961 [ 19 ], 1 [J ],1999,10 (3) :321 [ 21 ],, 1 [J ],1999,16 (2) :1651 [22 ],,,1 [J ],2000,17 (5) : 5641 [ 23 ],, 1 [J ],2000,17 (6) :6431 [24 ],,,1 [J ],2001,20 (1) : 451 [25 ], 1 [J ],2000,12 ( ) : 201 [ 26 ] 1 () [J ],1999,35 (12) :5331 [ 27 ] 1 () [J ],2001,37 (4) :1821 [30 ],,,1 () [J ], 1999, 35 (2) :511 [31 ],, () [J ],2001,37 (11) : 5081 [ 32 ],, 1 [J ],1998,18 (5) :121 [33 ],,,1 [J ],1998,15 (6) : 771 [ 34 ],, 1 [J ],1998,15 (6) :251 [35 ] 1 ( ) [J ],2000,26 (2) : 1681 [ 36 ], 1 () [J ],1999,35 (8) :3761
23 6 2003 12 Metallurgical Analysis [ 37 ],, 1 [J ],1999,16 (4) :4421 [ 38 ] 1 [J ],1999,18 (4) :3111 [39 ], 1 ( ) [J ],, 2000,23 (1) :541 [40 ],,1 () [J ], 2000, 36 (3) :2591 [ 41 ],, 1 [J ],2000,41 (4) :2181 5611 [42 ],, 1 [J ],2000, [78 ] 1 ( ) [J ],1999,23 (4) : 15 (3) :271 [43 ],,,1 [J ],2000,19 (6) : 241 [44 ],,,1 [J ],2002,21 (1) : 521 [ 45 ],,,1 [J ],2001,21 (2) :91 [ 46 ],, 1 [J ],1999,16 (2) :1861 [ 47 ],, 1 [J ],2000,20 (4) :171 [48 ],,,1 () [J ], 2001, 37 (4) :1741 [ 49 ], 1 [J ],1999,21 (3) :1691 [ 50 ], 1 [J ],2000,17 (3) :3641 [51 ],,,1 [J ],1998,14 (3) :2281 [ 52 ] 1 [J ],1998,17 (3) :2381 [53 ],,,1 () [J ], 1998, 34 (6) :3261 [54 ],,,1 () [J ], 1999, 35 (10) :4681 931 [55 ],,,1 ( [ 92 ] 1 [J ],2001,20 (4) :941 ) [J ],2000,9 (2) :901 [56 ],,, 1 [J ], 731 2000, (4) :421 [57 ],,,1 () [J ], 2001, 37 (11) :5121 [ 58 ],,,1 [J ],1998,18 (4) :151 [59 ],, 1 () [J ],1998,34 (7) : 3221 [ 60 ] 1 [J ],2001,18 (3) :3761 [61 ],,,1 [J ],1999,16 (4) : 3541 1999,29 (1) :301 [ 63 ], 1 [J ],2000,12 (4) :4521 [64 ],,1 [J ],2000,17 (5) : 5611 [ 65 ], 1 [J ],2000,22 (4) :121 [ 66 ], 1 () [J ],2000,36 (2) :721 [67 ],, 1 [J ],2000,12 (1) : 881 [68 ],,,1 [J ],1999,16 (4) : 4251 [ 69 ] 1 [J ],2000,16 (4) :2971 [ 70 ] 1 () [J ],2000,36 (9) :3941 [ 71 ] 1 () [J ],2000,36 (10) :4421 [72 ],,,1 () [J ], 2000, 36 (10) :4531 [ 73 ],,,1 [J ],1998,18 (5) :421 [74 ],,,1 () [J ], 2000, 36 (12) :5551 [75 ],, 1 ( ) [J ],2001,14 (2) :1821 [ 76 ],, 1 [J ],2001,23 (3) :1611 [77 ],, 1 () [J ],1999,35 (12) : 3731 [79 ] 1 ( ) [J ],2000, (4) : 631 [ 80 ],, 1 [J ],1998,15 (6) :281 [ 81 ], 1 [J ],1999,18 (3) :421 [82 ], 1 ( ) [J ],2000,24 (1) :901 [ 83 ] 1 [J ],1999,21 (4) :321 [ 84 ] 1 () [J ],1998,34 (7) :3201 [ 85 ] 1 [J ],1998,26 (7) :9131 [ 86 ],, 1 [J ],1998,18 (4) :261 [ 87 ] 1 [J ],1998,18 (4) :451 [ 88 ],,,1 [J ],1998,5 (11) :711 [89 ],, 1 [J ],1999,19 (1) :1021 [ 90 ],, 1 [J ],2000,27 (5) :461 [91 ],,,1 [J ],1999,18 (3) : [ 93 ],,,, [J ],2001,20 (6) : [ 94 ] 1 [J ],1998,17 (4) :341 [ 95 ],, 1 [J ],2000,19 (3) :481 [ 96 ] 1 [J ],1999, (3) :521 [ 97 ], 1 [J ],2000, (1) :761 [98 ],,1 [J ],2001,20 (5) : 491 [ 99 ], 1 [J ],1999,19 (1) :571 [ 100 ], 1 [J ],1999,15 (3) :2071 [ 101 ], 1 [J ],1999,27 (5) :5741 [ 62 ],, 1 ( ) [J ], [102 ],,,1 [J ],2001,29 (8) : 9071 [ 103 ] 1 [J ],1998,19 (1) :391 [ 104 ], 1 [J ],1998,5 (3) :1841 [ 105 ], 1 [J ],1998,15 (4) :651 [106 ],,,1 [J ], 1998, (4) :571 [ 107 ],, 1 [J ], 2000, 12 (3) :3311 [ 108 ], 1 [J ],2000, (5) :361 [109 ],,,1 [J ],2000,28 (11) : 14441 [ 110 ], 1 [J ],2001,28 (1) :531 [ 111 ],, 1 [J ], 2001,23 (2) :391 [ 112 ],, 1 [J ],1999,18 (4) :491 [ 113 ], 1 ( ) [J ], 1999 31
23 6 2003 12 Metallurgical Analysis (3) :1231 [114 ], 1 ( ) [J ], 1999,15 (3) :2071 [ 115 ], 1 () [J ],1999,35 (8) :3641 [116 ],, 1 [J ],1999,15 (5) : 4371 [ 117 ] 1 [J ],2000, (1) :541 [118 ],,1 [J ],2000,18 (3) : 3191 [ 119 ] 1 () [J ],2001,37 (4) :1641 [ 120 ] 1 () [J ],1998,34 (6) :2541 [ 121 ], 1 [J ],1999,25 (1) :251 [ 122 ], 1 () [J ],1999,35 (7) :3501 [ 123 ], [J ],1998,20 (4) :2241 [ 124 ] 1 [J ],2000,20 (6) :241 [ 125 ], 1 [J ],2001,18 (2) :2371 [126 ], 1 () [J ],,2001,37 (4) : 1641 [ 127 ], 1 [J ],2000,19 (4) :731 [ 128 ], 1 [J ],2000,19 (4) :801 [129 ],, 1 [J ],2000,16 (3) : 2201 [ 130 ] 1 [J ],2000,20 (2) :2501 [131 ],, 1 () [J ],2000,36 (12) : 5391 [ 132 ],, 1 [J ],1999,18 (6) :311 [133 ],,,1 () [J ],2001,37 (9) :3881 [134 ],, 1 () [J ],1999,35 (9) : 4021 [ 135 ],, 1 [J ],1999,18 (4) :2631 [ 136 ] 1 [J ],2000,28 (5) :5731 [ 137 ],, 1 [J ],1998,17 (5) :781 [138 ],, 1 [J ],2001,20 (1) : 401 [ 139 ],, [J ],2000,19 (6) :51 [ 140 ], 1 () [J ],2001,37 (6) :2721 [ 141 ],, 1 [J ],2001,21 (3) :11 [142 ],,,1 () [J ],1999,35 (10) :4401 [ 143 ], 1 ( ) [J ],2000,19 (2) :611 [ 144 ], 1 [J ],1999,19 (5) :101 [145 ], 1 ( ) [J ], 1999,22 (4) :3711 [146 ],, 1 [J ],2000,20 (1) :991 [ 147 ], 1 [J ],2001,18 (2) :2191 Progress of photometric analysis of copper in China ZHAI Qing2zhou,FAN Zhi ( Research Center for Nanotechnology,Changchun University of Science and Technology, Changchun 130022,China) Abstract :A review is given for the progress of the photometric analysis of copper in China according to general photometry,dual2wavelength photometry,three wavelength photometry,extraction photometry,flotation photometry,kinetic photometry,flow injection photometry,calculation photometry,fluorescence spectrophotometry during the recent year (1998-2001) 1One hundred and forty seven references were cited1 Key words :copper ;photometry ;review ( 42 ) Determination of zinc in aluminium alloy by spectrophotometry SHEN Liang2feng (Department of Civil Engineering of Hunan University of Science and Technology,Xiangtan 411201,China) Abstract :The color reaction of zinc Χ with 22[ (52bromo222pyridyl)2azo ]252diethylaminophenol (52Br2PADAP) was investigated in the presence of surfactant such as cetyltrimethylammonium bromide (CTMAB), Tween220, Triton X2100 in the ammonia2ammonium chloride buffer solution (p H815) 1 It was found that CTMAB had the best enhanced sensitivity effect. Based on this a spectrophotometric method for of trace zinc was proposed1the red complex of Zn Χ with 52Br2PADAP has a maximum absorptivity at 555nm1The apparent molar absorptivity is 1137 10 5 L mol - 1 cm - 1 1Beer s law is obeyed in the range of 0-15g/ 25mL for zinc1this method has been applied to the of trace zinc in aluminium alloy with satisfactory results1 Key words :zinc ;aluminium alloy ;spectrophotometry 32