Main ingredient in vinegar is acetic acid, containing small amounts of other organic acids.

After extracting the acidity in vinegar components, and testing reagents react to form a colored compound, using detector for determination of absorbance at 550nm, blank solution and sample solution on heat, and absorbance is directly proportional to its content.

Linear range: 1-20g/100g

1. Select test mode: conventional testing

2. sample processing

In a beaker 40mL distilled water, shake well and then vinegar to be measured from top to bottom, add 0.1mL vinegar to be measured, shake, as a stock solution of the sample.

3. control test

① 3mL g vinegar acid colorimetric tube detection of fluid in adding 150ul sample stock solution, mix well;

② take 2.5ml control samples in the colorimetric;

③ cell into the specified to the first channel, press ' control measure.

Note: the determination of a sample are required to carry out a blank experiment.

4. sample test

① 3mL g vinegar acid colorimetric tube detection of fluid in, reserve;

② take 2.5ml samples to be tested in the colorimetric;

③ cell into the specified channel, press the ' sample survey '.

(Note): this project the curve is inverse curve, compared with conventional projects, control sample/sample tests for contrast, follow the above steps.

Time:

(1) high level test

① When the test result is greater than the 8g/100g, go to ' test ' test mode to obtain more accurate data.

② steps in the '2' to ' take a beaker add 80mL distilled water, shake well and then vinegar to be measured from top to bottom, add 0.1mL vinegar to be tested ', the remaining steps do not change.

① with testing liquid have different degrees of damage to the skin, use protection. Carelessly filled with dry skin should immediately wash with plenty of water.

II save the test reagents need cool and dry place away from light, refrigerator 2~5℃ keeping the best.