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<br />)SIU Vi; <br />loll <br />ethod. <br />is nut <br />tential <br />i5 an <br />meats: <br /> <br />eung a <br />am the <br />:yanide <br />;CN),1, <br />Hide is <br />tr main <br />to the <br />Based <br />nl' each <br />~=~7VOti-nT=r JY~V <br /> <br />.YELL ~3~C,UC Ill( <br />~t irui~sr.~ nl l u:nn/tu <br />he Hated that lire li'ac cy:utidc analysi, i. ar'rcn uto hi_h, due to intcrt~lrcncc.~ <br />asociatcd wish [he titration method in minin¢ solution,. In some ca.c~. tlhe Irec <br />cyanide Icvet ix higher than tht wad cyanide level which ix not possible. <br />The difference between rite total :md wad cyanide values ix 25 mg/I. The onl}r metal <br />cyanide complex of the three mtn[ioncd that does not repon i» the wad prncedurc <br />is that of iron, which only reports in the total cyanide analysis. 7^htrctbra. the <br />correspondinE iron concentration present in the solution should be at about 9~0 m`/1 <br />(i.e. 0.36 z 25 nt~~/(1. <br />Assuming the free analysis is correct. about 50 m¢il of the wad cyanide is <br />contplextd (i.e. 179 ittg/I - 125 m;/I = SO tnc/I1. The corresponding copper and <br />nickel concentrations xhoutd be 34.0 mg/l and 5.0 me/I, respectively. There two <br />metals' concentration correlate to a calculated wad cyanide level of 5U marl, As a <br />result. it appears the metals and cyanide values art self consistent, and the analyses <br />arc reliable. Differences in the calculated and actual cyanide levels of 1U-201Percem <br />are common wi[h metallurgical solutions. <br />3.G REFERL• VCES <br />ASCI/SRK, "An Evaluation of the Effectiveness of Rinsing Procedures cn Qyanide <br />Removal t'ront Spent Heap Leach Ore; Brottttt Mining Corporation. i.tad. South <br />Dakota, USA", for State of Scuth Dakota. Sep ember 1990. <br />ASTM, Section II. Water and Environmental Technology, Volume I I.U_', 1955. <br />Barton, P., hlamnter. C.A., and Kennedy, D.C., "Analysis of Cyanides in Cokle Plant <br />Wastewater Eflluents". Journal Water Pollution Control Federation. pp. 2~fi4-239, <br />1978. <br />[3rickcll, R.H.. "Chemistry of Cyanide Solutions". Presented at Cyanide and tMe Gold <br />Minine Industry: A Technical Seminar, sponsored by Environment Can;~da and <br />Canadian Mineral Proccsxnrs. 19R 1. <br />Conn. K.. "Cyanide Analysis in Mint Effluents", Cyanide and the Gold Mining <br />Industry: A Technical Seminar. Ottawa, Ontario, 1981. <br />l Csikai, N.1. and Barnard. A.A.Jr.. "Determination of Total C~agidc in <br />:olutian i Tltiocyanatc-Containin~_ W:utcu~mcrs". Analytical Chtmistn•, Vol. 95. p. 1671. 198?. <br />. should <br />43 Clruprer 7'na <br />ti „ <br />I~ i <br />i <br />I~~ <br />~i <br />I~ <br />~: <br />