TY - JOUR AU - Franklin Guenther AU - Walter Miller C2 - Analytical and Bioanalytical Chemistry DA - 2006-11-01 LA - en M1 - in press PB - Analytical and Bioanalytical Chemistry PY - 2006 TI - The Certification of SRM 2731 [at nominal 20 umol/mole H2 S/N2] Using Two Independent Methods ER -