Analyte: Ammonium (dihydrogen) phosphate - monobasic (as phosphate), CAS Number: 7722-76-1; InChl: LFVGISIMTYGQHF-UHFFFAOYSA-N; Analyte: Sodium fluoride (as fluoride), CAS Number: 7681-49-4; InChl: PUZPDOWCWNUUKD-UHFFFAOYSA-M; Analyte: Sodium nitrate (as nitrate), CAS Number: 7631-99-4; InChl: VWDWKYIASSYTQR-UHFFFAOYSA-N; Analyte: Potassium chloride (as chloride), CAS Number: 7447-40-7; InChl: WCUXLLCKKVVCTQ-UHFFFAOYSA-M; Analyte: Potassium sulfate (as sulfate), CAS Number: 7778-80-5; InChl: OTYBMLCTZGSZBG-UHFFFAOYSA-L ; . EPA, Method: 300; EPA, Method: 300.1; EPA, Method: 9056A.