L-谷氨酸[谷氨酸盐/谷氨酸酯/味精/谷氨酸单钠]检测试剂盒

Colourimetric method for the determination of L-Glutamic Acid 
(Monosodium Glutamate; MSG) in foodstuffs and other materials

Principle:
                         (beef liver glutamate dehydrogenase)
(1) L-Glutamic acid + NAD⁺ + H₂O ↔ 2-oxoglutarate + NADH + NH₄⁺

                         (diaphorase)
(2) INT + NADH + H⁺ → NAD⁺ + INT-formazan

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