Attogene’s 0.5mL Micro Spin Desalting Columns are convenient, simple, and ready to be used out of the box. We provide a product that facilitates equal, if not superior results to leading brands products at a significantly better cost. Superlative recovery of proteins and other macromolecules (>7000 MW) with greater than 95% retention of salts, and other small molecules (<1000 MW), are possible even with very dilute (25 ug/mL) samples. Our columns, which are constructed with a simple break away tab at the bottom, are comprised of polypropylene and contain our own proprietary resin slurry that we’ve developed in house to achieve optimal results. Sample volumes between 30-130uL can be loaded while still achieving expected purification numbers.
For enriching bile-tolerant Gram-negative bacteria in the microbiological examination of pharmaceutical products.
Principle and Interpretation
Pancreatic digest of gelatin provide protein, vitamins and amino acids; glucose carbon source; disodium hydrogen phosphate and potassium dihydrogen phosphate as a buffer; ox bile and brilliant green as selective antibacterial agent, inhibiting the growth of non-Enterobacteriaceae.
Formulation
Ingredients
/liter
Pancreatic digest of gelatin
10g
Glucose monohydrate
5g
Dehydrated ox bile
20g
Potassium dihydrogen phosphate
2g
Disodium hydrogen phosphate dihydrate
8g
Brilliant green
15mg
pH7.2±0.2 at 25°C
Preparation
Suspend 45g in 1L of distilled water,stir until completely dissolved and dispense 100 mL into test tubes , heat at 100 °C for 30 min in a waterbath or flowing steam.
Quality Control
The following quality control strains were inoculated and cultured at 30-35℃ for 24h-48h. The results are as follows:
Quality control strains
Inoculum (CFU)
Growth
Escherichia coli ATCC8739
< 100
Good growth
Pseudomonas aeruginosa ATCC9027
Staphylococcus aureus ATCC6538
> 100
Inhibited
Storage and Shelf Life
2-30℃，Keep container tightly closed, avoid direct sunlight.
Use before expiry date on the label.
Precautions
1. When weighing the dehydrated medium, please wear masks to avoid causing respiratory system discomfort
2. Keep container tightly closed after using to prevent clumping.
Waste Disposal
Microbiological contamination was disposed by autoclaving at 121°C for
30 minutes.
Document
Intended Use For enriching bile-tolerant Gram-negative bacteria in the microbiological examination of pharmaceutical products. Principle and Interpretation Pancreatic digest of gelatin pro……
Short term stability: 2-8oC, Long term stability: See individual component labels
Stability:
> 2 years under recommended storage conditions
Analyte:
L-Malic Acid
Assay Format:
Spectrophotometer, Microplate
Detection Method:
Absorbance
Wavelength (nm):
340
Signal Response:
Increase
Linear Range:
0.5 to 30 µg of L-malic acid per assay
Limit of Detection:
0.25 mg/L
Reaction Time (min):
~ 3 min
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, NBN, ISO and MEBAK
The K-LMAL-58A pack size has been discontinued (read more)
L-Malic Acid (Regular) Assay Kit, for the specific assay of L-malic acid (L-malate) in beverages and food products.
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).
Need other assay kits? View our full list of organic acid assay kits.
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
