Nitrate-API colorimetric assay

Tropic Marin Nitrite/Nitrate Professional Test Kit

API nitrite test kit — Measuring nitrite with the colorimeter

Nitrate-API colorimetric assay

A colorimetric method for use within portable test kits for nitrate determination in various water matrices - Analytical Methods (RSC Publishing)

Measuring nitrite with the Open Colorimeter

Development of an Inexpensive, Rapid Method to Measure Nitrates in Freshwater to Enhance Student Learning

API Nitrate Test: Do's And Don'ts

Nitrate-API colorimetric assay

Enhanced Nitrite Production from the Aqueous Photolysis of Nitrate in the Presence of Vanillic Acid and Implications for the Roles of Light-Absorbing Organics

Overview Easy-to-use liquid test solutions for ammonia, nitrite, and nitrate Essential when cycling a new aquarium or maintaining ideal water

API Ammonia, Nitrate & Nitrate Test Kits

Colorimetric test kit VISOCOLOR ECO Nitrate MACHEREY-NAGEL, MN