TY - RPRT TI - Traceable values for nitrate in water samples by isotope dilution analysis using a small thermionic quadrupole mass spectrometer. AU - J C Wolff AU - D P Taylor AU - P De Bièvre PY - 1996 DO - 10.1021/ac9603688 UR - https://pubmed.ncbi.nlm.nih.gov/8797384/ ID - 8797384 ER -