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~~) D 4374 <br />performing these test methods will be required to measure incorporate formal QA/QC procedures into the test methods <br />their performance against the performance level achieved by at such time as they have passed the consensus process and <br />the interlaboratory study of these test methods. have been o0icially accepted by the Society. <br />16.6 It is the intention of Subcommittee D19.06 to <br />APPENDIXES <br />(Nonmsndatory Information) <br />Xl. SULFIDE INTERFERENCE <br />TABLE X1.1 Reaction of Sulfide with Cyanide at pH > 12 and Formation o1 Thiocyanate <br />CN = 100 µg~L (es KCN), S' = 10 g~L (as NasS) <br />Nora-Permission has been granted by Tire Metropolitan Sanitary District o/ Greeter Chicago (MSDGC) to indutle this atlditional information <br />Timor <br />Oh 2h bh 6h 24h <br />D" Ta D T D T D T D T <br />CN- wncentrate, 100 100 87 701 85 102 64 103 77 702 <br />µg/L <br />CN- transfortnetl ... 13 % 16 % 16 % 23 % <br />to SCN <br />2 Day 3 Day 1 week 2 week 3 week <br />CN- concentrate, 70 99 67 95 63 96 46 101 39 100 <br />µ9/L <br />CM translormed 30 % 33 % 37 % 64 % 61 % <br />to SCN <br />" D = Dissociable cyanide, µg/L <br />a T =Total cyanitle. µg/L. <br />Ill <br />