Propargyl-PEG12-methane is a PEG linker that can react with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry to form a stable triazole linkage. The PEG chain enhances the solubility of the molecule in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Detail
Propargyl-PEG12-methane is a PEG linker that can react with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry to form a stable triazole linkage. The PEG chain enhances the solubility of the molecule in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Short term stability: 2-8oC, Long term stability: See individual component labels
Stability:
> 2 years under recommended storage conditions
Analyte:
Ammonia, Nitrogen, YAN
Assay Format:
Spectrophotometer, Microplate, Auto-analyser
Detection Method:
Absorbance
Wavelength (nm):
340
Signal Response:
Decrease
Linear Range:
0.2 to 7 µg of ammonia per assay
Limit of Detection:
0.07 mg/L
Reaction Time (min):
~ 5 min
Application examples:
Grape juice, wine, fruit juices, soft drinks, dairy products (e.g. milk), dietetic food, soy sauce, eggs and egg products, cheese, meat, processed meat, seafood, bakery products (and baking agents), fertilisers, pharmaceuticals, tobacco, cosmetics, water, Kjeldahl analysis, paper (and cardboard), water and other materials (e.g. biological cultures, samples, etc.).
Method recognition:
Methods based on this principle have been accepted by MEBAK
Ammonia Assay Kit, for the rapid measurement and analysis of ammonia in all samples, including grape juice and wine (and other foods/beverages).
Note for Content: The number of manual tests per kit can be doubled if all volumes are halved. This can be readily accommodated using the MegaQuantTM Wave Spectrophotometer (D-MQWAVE).
Usages: For selective cultivation of bacteria especially Vibrio.
Principle: Peptone provide carbon and nitrogen sources; sodium chloride to maintain osmotic equilibrium; higher pH can suppress the growth of coliform and other bacteria, it is conducive to the growth of Vibrio cholerae.
How to use: 1.Suspend 18g in 1L of distilled water, stirring heated to boiling to completely dissolve, autoclave at 121℃ for 15 minutes. 2.Diluted and treated samples.
Quality control:
Item
The name and number of strain
Growth
Colony Color
1
Vibrio cholerae VbO
Good
Turbid broth
2
Escherichia coli ATCC25922
Poor
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Storage: Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.