GDYQ-110SF determination of acid value of edible oils - Determination of acid value of plant - Zhengzhou Grain Machinery Factory
Model GDYQ-110SF
First, application field
Suitable for determination of various edible vegetable oil, animal oil in oil acid value.
Two. Technical indicators
1. determination of the lower limit: 0.1mg KOH/g
2. determination range: 0.0-30.0mg KOH/g
Three, the required reagent (reagent order number: 5Q113J-H1-1)
1. edible oleic acid reagent (1), (two)
Four. Measurement steps
1. operation steps
(1) solid Shantou sample: 70-80 centigrade water bath heating dissolved sample, liquid oil sample is directly called sample.
(2) using electronic scales accurately weighed sample of about 1. 00 grams in the droplet counting bottle, then move the edible oil acid value reagent with the pipette (1) 5 milliliters in the drop counting bottle, the left and right shaking droplet counting bottle, causes the sample to dissolve fully. The sample solution was titrated with 1000 micro - L edible oleic acid reagent (two) with a micro drop liquid. The sample solution is slightly red and does not fade for 30 seconds. The volume V of the edible oleic acid reagent (two) was recorded, and the average value (milliliter) was taken two times in repeated titrations.
2. result calculation
3. result determination
The results of titration refer to the national standard.
Five. Precautions
1. titrations must be added by a drop by drop, otherwise the drop is not allowed to produce error. When the point is close to the point, discoloration is faster and must be quickly rolled slowly.
2.30 seconds does not fade, it means that when we enter the end point, add 1 drops of solution and shake it. After 30 seconds, it does not fade. It is not allowed to shake for 30 seconds. Otherwise, the carbon dioxide in the air will enter, and the result will be higher.