Kit size: 60 assays (manual) / 600 (microplate) / 700 (auto-analyser) Method: Spectrophotometric at 492 nm Reaction time: ~ 9 min Detection limit: 0.21 mg/L Application examples: Fruit and vegetables (e.g. tomato), processed fruit and vegetables (e.g. tomato puree / juice, ketchup, soy sauce), condiments, processed meat products (e.g. extracts, bouillon and sausages), soup, pharmaceuticals and other materials (e.g. biological cultures, samples, etc.) Method recognition: Methods based on this principle have been accepted by ISO, GOST and NMKL