TY - RPRT TI - Substitution of tetramethylbenzidine for benzidine in cyanide analyses. AU - K J Williams AU - R Rosenstein AU - R P Smith PY - 1985 DO - 10.1016/0009-8981(85)90025-7 UR - https://pubmed.ncbi.nlm.nih.gov/3978818/ ID - 3978818 ER -