货源充足
In fertilised or incubated eggs, the level of D-3-hydroxybutyric acid
rises from trace levels to > 5 mg/kg (dry weight), and can reach
approximately 800 mg/kg in badly spoiled eggs. As
D-3-hydroxybutyric acid producing processes only occur after
approximately 6 days, the level of this acid is used to indicate how
fresh eggs are, or how fresh eggs were, when they were employed in
the manufacture of processed egg products. In clinical chemistry, the
level of D-3-hydroxybutyric acid is determined in the diagnosis of
diabetic ketoacidosis.
KITS:
Kits suitable for performing 60 determinations are available from
Megazyme. The kits contain the full assay method plus:
Bottle 1: TEA buffer (35 mL, 0.4 M, pH 8.6) plus
K2HPO4 (50 mM),Triton X-100 (2.5 % v/v) and
sodium azide (0.02 % w/v).
Stable for > 2 years at 4°C.
Bottle 2: (x2) NAD+ (70 mg) plus INT (3.5 mg).
Stable for > 2 years at 4°C.
Bottle 3: Diaphorase suspension (1.25 mL, 150 U/mL).
Stable for > 2 years at 4°C.
Bottle 4: 3-Hydroxybutyrate dehydrogenase suspension
(1.25 mL, 270 U/mL). Stable for > 2 years at 4°C.
Bottle 5: D-3-Hydroxybutyric acid standard solution
(5 mL, 0.06 mg/mL). Stable for > 2 years at 4°C.
比色法测定食品以及其他原料中的L-谷氨酸(味精,MSG) 货号: 10013
试剂盒型号: 60次检测
方法:分光光度计,492 nm
反应时间:9 min
检测限:0. 21 mg/L
适用样品:水果和蔬菜(如番茄)、加工过的水果和蔬菜(如:番茄汤/汁,番茄酱,酱油)、调味品、加工过的肉制品(如:提取物、肉汤和香肠)、汤、医药品以及其他原料(如生物培养基、样品等)
货源充足 货号:10803
比色法测定食品和发酵产物中的葡糖氧化酶
诚剂盒型号: 200次检测
方法:分光光度计, 510 nm
反应时间:20 min
检测限:10 U/L
适用样品:酶制剂以及其他原料(如生物培养基等样品)