品牌：Megazyme
產品貨號：K-DLATE
產品品名：乳酸檢測試劑盒
英文品名：D-/L-Lactic Acid (D-/L-Lactate) (Rapid) Assay Kit
規格型號：100 assays (50 of each) per kit

For the rapid and specific concurrent assay of L-lactic acid(L-lactate) and D-lactic acid (D-lactate) in beverages, meat, dairy andfood products. (100 determinations per kit; 50 of each).

D- and L-lactic acid are found in many foods and beverages. Producednaturally by lactic acid bacteria, D- and L-lactic acid are found inmany fermented milk products such as yoghurt and cheese, and also inpickled vegetables, and cured meats and fish. L-Lactic acid issupplemented into foods and beverages (E270) where a tart flavour isdesired, and is widely used as a non-volatile acidulant. In the eggindustry, L-lactic acid is a quality indicator, where levels above 200 mg/kg indicate spoilage by contamination or incubation. Similarly,the quality of milk and fruit juice can be established by measurement ofthe D- and L-lactic acid content. In the wine industry, the course ofmalolactic fermentation is monitored by following the falling level of L-malic acid, and the increasing level of L-lactic acid. The productionof D-lactic acid can indicate wine spoilage. In the chemical industry,both D- and L-lactic acid are raw materials in the production of compounds such as polylactides and biologically degradable polymers,and applications also exist for these acids in cosmetics and pharmaceuticals.

Kits suitable for performing 50 concurrent determinations of D- andL-lactic acid are available from Megazyme. The kits contain the fullassay method plus:
Bottle 1: (x2) Buffer (25 mL, pH 10.0) plus D-glutamate and sodiumazide (0.02% w/v) as a preservative.Stable for > 2 years at 4°C.
Bottle 2: (x2) NAD+.Stable for > 5 years at -20°C.
Bottle 3: D-Glutamate-pyruvate transaminase suspension(2.2 mL).Stable for > 2 years at 4°C.
Bottle 4: L-Lactate dehydrogenase suspension (1.1 mL).Stable for > 2 years at 4°C.
Bottle 5: D-Lactate dehydrogenase suspension (1.1 mL).Stable for > 2 years at 4°C.
Bottle 6: D-/L-Lactic acid standard solution (5 mL, 0.15 mg/mL of each)in 0.02% (w/v) sodium azide.Stable for > 2 years at 4°C.