英文品名：d-/l-lactic acid (d-/l-lactate) (rapid) assay kit
规格型号：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).
王先生 手机：13296136554 qq:2867959799
introduction:
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:
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.
西宝生物科技（上海）股份有限公司
13296136554
中国 上海