分类目录归档：Megazyme

L-苹果酸检测试剂盒

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L-苹果酸检测试剂盒L-Malic Acid Assay Kit (Manual Format)

产品货号： K-LMALL
产品品名： L- 苹果酸检测试剂盒（大）
英文品名： L-Malic Acid Assay Kit (Large)
规格型号： 116 assays
原理：
反应时间： 3min
检测限： 0.25 mg/L,
适用样品： 饮料和食品以及其他原料
优点：
l    成本低
l    使用期间所有试剂的稳定性 >2 年
l    操作简单
l    包含标准品
REFERENCES:

  1. Mollering, H. (1985). L-Malate. In  Methods of Enzymatic Analysis  (Bergmeyer, H. U., ed.), 3rd ed., Vol. VII, pp. 39-47, VCH Publishers (UK) Ltd., Cambridge, UK.
  2. AOAC Official Methods of Analysis (2002). Method 993.05 “L-Malic acid/total malic acid ratio in apple juice”. 17th ed. Chapter 37, p. 15.
  3. Gorin, N. (1976). Differences in L-malate determined enzymatically or titrimetrically in golden delicious apples.  Zeitschrift fur Lebensmittel-Unterschung und-Forschung,  162, 259-261.
  4. Klopper, W. J., Angelino, S. A. G. F., Tuning, B. & Vermeire, H. A. (1986). Organic acids and glycerol in beer.  J. Inst. Brew.  92, 225-228.
  5. Elkins, E. R. & Freund, W. (1994). Detection of adulteration in apple juice by L-malic/total malic acid ratio: Collaborative Study.  J. AOAC Int . 77, 411-415.
商品说明：
L-Malic Acid (Regular) Assay Kit, for the specific assay of L-malic acid (L-malate) in beverages and food products.
Manual format UV-method for the determination of L-Malic Acid in foodstuffs, beverages and other materials
Principle:
(L-malate dehydrogenase)
(1) L-Malic acid + NAD+ ↔ oxaloacetate + NADH + H+
(glutamate-oxaloacetate transaminase)
(2) Oxaloacetate + L-glutamate → L-aspartate + 2-oxoglutarate
Kit size: (K-LMALR)
58 assays (manual) / 580 (microplate) or
(K-LMALL)
116 assays (manual) / 1160 (microplate)
Method: Spectrophotometric at 340 nm
Reaction time: ~ 3 min
Detection limit: 0.25 mg/L
Application examples:
Wine, beer, fruit juices, soft drinks, candies, fruit and vegetables,
bread, cosmetics, pharmaceuticals and other materials (e.g. biological
cultures, samples, etc.)
Method recognition:
Methods based on this principle have been accepted by AOAC, EEC,
EN, NF, NEN, DIN, GOST, OIV, IFU, AIJN and MEBAK
Advantages

  • PVP incorporated to prevent tannin inhibition
  • Both enzymes supplied as stable suspensions
  • Very competitive price (cost per test)
  • All reagents stable for > 2 years after preparation
  • Very rapid reaction (~ 3 min)
  • Mega-Calc™ software tool is available from our website for hassle-free raw data processing
  • Standard included
  • Extended cofactors stability
  • Suitable for manual and microplate format

麦芽淀粉酶检测试剂盒 Malt Amylase Assay Kit

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麦芽淀粉酶检测试剂盒 Malt Amylase Assay Kit
货号： K-MALTA
品名：麦芽淀粉酶检测试剂盒 Malt Amylase Assay Kit
型号：100 assays per kit
α-淀粉酶，β-淀粉酶在淀粉降解代谢过程中或发酵糖发芽或谷物麦芽中发挥重要作用。
上海子起生物提供麦芽淀粉酶检测试剂盒，比色法（400nm）测定谷物、麦芽、食品、饮料和发酵产品中的α-淀粉酶和Beta-淀粉酶。
原理：（说明书 请致电 400-811-9081）
(1) α-淀粉酶检测利用“Ceralpha” 方法
(2) Beta-淀粉酶检测利用 “Betamyl-3” 方法
反应时间：
麦芽淀粉酶检测试剂盒 K-MALTA 
~ 20 min (Ceralpha 方法)
~ 10 min (Betamyl-3 方法)
检测限：0.05 U/mL
适用样品：面粉、麦芽、发酵液和其他原料
优点：
价格低廉（每次检测成本）
所有试剂配制后的稳定性>2年
只适用于酶法试剂盒
特异性高
方法简单
包含标准品
方法认证：AOAC (Method 2002.01), AACC (Method 22-02.01),ICC (Standard No. 303), RACI (Standard Method), and CCFRA (Flour Testing Working Group Method 0018)
RACI (标准方法)