產品貨號：K-CITR

品牌：Megazyme

產品品名：檸檬酸檢測試劑盒

英文品名：Citric Acid Assay Kit

規格型號：72 assays (manual) / 720 assays (microplate) / 840 assays (auto-analyser) 

A flexible and simple method for the rapid and reliable measurement ofcitric acid (citrate) in foods, beverages and other materials.

INTRODUCTION:

Due to its excellent acidulant, flavorant and preservative properties,
citric acid (citrate) is found in a large number of natural and
processed foods and beverages, such as fruit juice and other soft
drinks, beer, milk, bread, candies, and dairy and meat products. This
acid also finds many other applications, such as in paper manufacture,
or in the wine industry, where the presence of significant quantities
indicates the use of citric acid as an acidulant, a practice with an
allowable upper limit of just 1 g/L (final concentration) in the EU.
The quantification of citric acid is also important in clinical chemistry.
Polyvinylpyrollidone (PVP) has been incorporated into the Megazyme
assay format to prevent inhibition caused by tannins found in grape
juice, fermenting must and wine. In addition to a > 2 years shelf life
and competitive price, manual (see page 5 “A”), auto-analyser (see
page 6 “B”) and microplate (see page 8 “C”) assay procedures are
described, making this product ideal for citric acid determination
applications in laboratories of any size.

KITS:

Kits suitable for performing 72 assays in manual format (or 840
assays in auto-analyser format or 720 assays in microplate format) are
available from Megazyme. The kits contain the full assay method plus:
Bottle 1: Buffer (40 mL, pH 7.5) plus sodium azide (0.02%) as
a preservative. Stable for > 2 years at 4°C.
Bottle 2: NADH plus PVP.
Stable for > 5 years at -20°C.
Bottle 3: L-Malate dehydrogenase plus D-lactate
dehydrogenase, 1.5 mL.
Stable for > 2 years at 4°C.
Bottle 4: (x 3) Citrate lyase lyophilisate.
Stable for > 2 years at -20°C.
Bottle 5: Citric acid standard solution (5 mL, 0.20 mg/mL) in
0.02% (w/v) sodium azide.
Stable for > 2 years at 4°C.

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