Method, reagent and kit for the determination of nitrate ions
AssigneeMerck Patent GmbH
InventorRoland Bitsch
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Abstract
A method for the colorimetric determination of nitrate ions comprises mixing the sample which is to be investigated with concentrated sulfuric acid and a color-generating compound of the formula ##STR1## wherein R is H, one equivalent of a cation, or C.sub.1-6 alkyl. A reagent and kit for colorimetric nitrate determination are also described.
Claims15
A method for the colorimetric determination of nitrate ions comprising admixing a sample with concentrated sulfuric acid and a color-generating compound having the formula ##STR3## wherein R is H, one equivalent of a cation compatible with nitrate ion determination, or C.sub.1-6 alkyl, said color-generating compound being present in an amount effective to produce a quantitative coloration obtaining a resultant admixture and correlating the color of the resultant admixture with a calibrated reference standard.
A reagent for colorimetric nitrate ion determination, consisting essentially of a solution of a compound having the formula ##STR4## wherein R is H, one equivalent of a cation compatible with nitrate ion determination or C.sub.1-6 alkyl, and concentrates sulfuric acid, said compound and said concentrated sulfuric acid being present in amounts effective to produce a quantitative coloration.
A kit for colorimetric nitrate ion determination, comprising a container of a compound having the formula ##STR5## wherein R is H, one equivalent of a cation compatible with nitrate ion determination or C.sub.1-6 alkyl, and a container of concentrated sulfuric acid.
Dependencies are inferred from the claim text.