The CellG3 assay reagent for the measurement of endo-cellulase (endo-1,4-β-glucanase) contains two components; 1) 4,6-O-benzylidene-2-chloro-4-nitrophenyl-β-D-cellotrioside (BCNPG3) and 2) thermostable β-glucosidase. The benzylidene blocking group prevents any hydrolytic action by the β-glucosidase on BCNPG3. Incubation with an endo-cellulase generates a non-blocked colourimetric oligosaccharide that is rapidly hydrolysed by the ancillary β-glucosidase. The rate of formation of 2-chloro-4-nitrophenol is therefore directly related to the hydrolysis of BCNPG3 by the endo-cellulase. The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH 9.0).
Please note that a new assay kit (K-CellG5) is now available for the measurement of endo-cellulase. The CellG5 reagent contains a cellopentaose core and exhibits vastly improved sensitivity for some cellulases. In addition, the exchange of the benzylidene blocking group in CellG3 for 3-keto-butylidene in CellG5 improves the substrate’s water solubility significantly, allowing for a reduction in the concentration of DMSO required in the assay. As DMSO is known to inhibit certain cellulases, this is another benefit in using CellG5. Megazyme now recommends the use of K-CellG5 for all assays for the measurement of endo-cellulase.
The CellG3 assay reagent for the measurement of endo-cellulase (endo-1,4-β-glucanase) contains two components; 1) 4,6-O-benzylidene-2-chloro-4-nitrophenyl-β-D-cellotrioside (BCNPG3) and 2) thermostable β-glucosidase. The benzylidene blocking group prevents any hydrolytic action by the β-glucosidase on BCNPG3. Incubation with an endo-cellulase generates a non-blocked colourimetric oligosaccharide that is rapidly hydrolysed by the ancillary β-glucosidase. The rate of formation of 2-chloro-4-nitrophenol is therefore directly related to the hydrolysis of BCNPG3 by the endo-cellulase. The reaction is terminated and the phenolate colour is developed on addition of Tris buffer solution (pH 9.0).
170.5 mL of prepared reagent (e.g. 550 assays of 0.31 mL)
Content:
170.5 mL of prepared reagent (e.g. 550 assays of 0.31 mL)
Shipping Temperature:
Ambient
Storage Temperature:
Short term stability: 2-8oC, Long term stability: See individual component labels
Stability:
> 2 years under recommended storage conditions
Analyte:
Acetic Acid
Assay Format:
Auto-analyser
Detection Method:
Absorbance
Wavelength (nm):
340
Signal Response:
Decrease
Linear Range:
up to 1.8 g/L of acetic acid per assay
Limit of Detection:
10 mg/L (recommended assay format)
Reaction Time (min):
~ 10 min
Application examples:
Wine, beer, fruit and fruit juices, soft drinks, vinegar, vegetables, pickles, dairy products (e.g. cheese), meat, fish, bread, bakery products (and baking agents), ketchup, soy sauce, mayonnaise, dressings, paper (and cardboard), tea, pharmaceuticals (e.g. infusion solutions), feed and other materials (e.g. biological cultures, samples, etc.).
Method recognition:
Improved method
The Acetic Acid analyser format test kit is suitable for the specific measurement and analysis of acetic acid (acetate) in beverages and food products. On calibration, the prepared reagent is linear to > 28 micrograms of acetic acid per mL of assay solution.
View our complete list of organic acid assay kits.
Advantages
Very stable reagent when prepared for auto-analyser applications (> 7 days at 4oC)
PVP incorporated to prevent tannin inhibition
Linear calibration (R2 ~ 0.9995) up to 30 μg/mL of acetic acid in final reaction solution
Validated by the University of Wine, Suze la Rousse, France
Very rapid reaction
Very competitive price (cost per mL of reagent)
All reagents stable for > 2 years
Extended cofactors stability
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The Acetic Acid analyser format test kit is suitable for the specific measurement and analysis of acetic acid (acetate) in beverages and food products. On calibration, the prepared reagent is linear to > 28 micrograms of acetic acid per mL of assay solution.
Optically clear flat bottom plates with detachable wells allow for direct microscopic viewing and can be used with top and bottom reading instruments. Detachable wells give the user improved flexibility. Individual alphanumerical codes for easy identification. Minimum volume of 50uL maximum of 300.
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Set of 10 breakable well 96 well plates Perfect for Lateral Flow or Enzyme Assays
