N.H. Code Admin. R. Saf-C 6401.15
“Internal standard” means a substance of known concentration which is chemically similar and distinctly identifiable from the analyte.
Source. #8454, INTERIM, eff 11-1-05, EXPIRED: 4-30-06 (See Revision Note at Chapter Heading for Saf-C 6400) New. #8620, eff 5-1-06; ss by #9684, eff 3-23-10 (fromSaf-C 6401.16); ss by #12526, eff 5-11-18 (from Saf-C 6401.14)