Product instruction:

citric acid is an important organic Acid, also known as citrate. Because citric acid has a gentle and delicious sour taste, it is common for various beverages, soda, wine, candy, snacks, cookies, canned juices, dairy products. In all organic sour markets, citric acid market share 70% , there is no foundation that can replace citric acid.

Citric acid has an absorption peak in 210 nm , and its content can be determined using HPLC.

The instrument and reagent required in the test :

[123

High-performance liquid chromatograph (Polaris C18-a

column

(4.6 × 250 mm) , UV detector

, desktop centrifuge, adjustable pipette, mortar

/ homogenizer , EP T (2 mL) , needle filter (water system), syringe, filter, filtration membrane ( water system, organic system , brown into S botap (50 , 1.5 mL) , Ultra-pure water . Product content: extract : 80 mL × 1 Bottle , 4 ° C

Save

. Reagent 1: Liquid

2 mL × 1

Bottle , 4 ° C Save . Reagent 2: Powder × 2 Bottle,

4 ° C

Preservation . Standard: Powder × 1 Bottle, 4 ° C protected

Save.

Pre-use 2 mL Distilled water was prepared by 10 mg / ml citric acid standard solution,

4

° CSealed storage to avoid direct sunlight.

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