029080 Glycerin

 K-LMALMQ

60 assays per kit

Content:	60 assays per kit
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:	L-Malic Acid
Assay Format:	Spectrophotometer
Detection Method:	Absorbance
Wavelength (nm):	505
Signal Response:	Increase
Linear Range:	0.15 to 15 µg of L-malic acid per assay (i.e. 0.007-0.75 g/L with a 20 µL sample volume)
Limit of Detection:	15.4 mg/L
Reaction Time (min):	~ 6 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:	Novel method

This product has been discontinued (read more).

The L-Malic Acid test kit is suitable for the measurement and analysis of L-malic acid in grapes, grape juice and wine using the MegaQuant™ colorimeter (measurement at 505 nm). Suitable for white and red wines at all stages of the winemaking process.

Show all organic acid assay kits.

Advantages

• Novel product, patented technology 
• Highly stable reagents (at least three seasons use) 
• Very competitive price (cost per test) 
• Spectrophotometer / laboratory / expertise not required 
• Very simple procedure 
• Rapid reaction time (~ 6 min) 
• Standard included

The L-Malic Acid test kit is suitable for the measurement and analysis of L-malic acid in grapes, grape juice and wine using the MegaQuant™ colorimeter (measurement at 505 nm). Suitable for white and red wines at all stages of the winemaking process.

Description

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Introduction

Usages:

For cultivations of yeasts , moulds and acidophilic bacteria.

Principle:

Peptone and yeast extract powder provides carbon and nitrogen sources and trace elements; lactose are fermentable sugars; sodium chloride maintains osmotic equilibrium; the 3rd bile salts and crystal violet inhibiting gram-positive bacteria, especially against Gram positive bacteria and fecal streptococci; neutral red as pH indicator.

Formulation(per liter):

Peptone 5g

Tryptone 5g

Glucose 20g

Final pH 5.7 ± 0.1        

How to use:

1.Suspend 30g in 1 L of distilled water , stirring heated to boiling until completely dissolved, dispensing flask, 121 autoclave for 15min.

2.Diluted and treated samples.

Quality control:

Item	The name and number of strain	Growth	Colony Color
1	Aspergillus niger ATCC16404	Good	Spore surface growth
2	Candida albicans ATCC10231	Good	Cloudy broth
3	Escherichia coli ATCC25922	Inhibition	—

Storage: Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.

500g