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This paper establishes a fully automatic

Abbe refractometer

The calibration method is to analyze the calibration result of the instrument by configuring a series of sucrose solution and combining the computer spreadsheet function. The performance of the instrument is proved to be better than the traditional Abbe refractometer.

experimental method

Weigh 1.0 g, 2.0 g, 3.0 g, 4.0 g, 5.0 g of analytically pure sucrose in 5 small beakers, and add 24 g, 23 g, 22 g, 21 g, 20 g of purified water by weight method, and shake evenly. Move back into a 25 ml colorimetric tube.

The refractometer used in this experiment is ATAGO (Ai Tuo

)

Automatic refractometer

, the product model used is

Rx-5000a

. The instrument was preheated for 20 minutes and then measured. The instrument was zeroed with distilled water before the start of the experiment. Pipette 1 drop of the solution to be tested with a Pasteur pipette

Automatic refractometer

The detection window, back cover the detection window, press the START button to detect, when the temperature reaches 20.00 degrees Celsius, the instrument performs the test, the test results are as follows: Figure 1, the test results of the refractometer Standard value test value mean error

4%

4.00%

4.00%

4.00%

4.00%

0

8%

7.94%

7.95%

7.96%

7.95%

0.05%

12%

11.82%

11.83%

11.83%

11.83%

0.17%

16%

15.90%

15.90%

15.95%

15.92%

0.08%

20%

19.84%

19.83%

19.87%

19.85%

0.15%

The results were analyzed by excel XY scatter plot. The results are as follows: Figure 2, Results Analysis Table

The results of the above figure show that the linear coefficient of the method is 1, the linearity is good, and the slope of the data is 0.9921.

The reagents used in this experiment are of analytical grade, sucrose is easy to absorb water, resulting in low detection results. However, the detection error of Brix in this experiment is less than 0.2%, and the precision value is less than 0.5%, which can fully meet the testing requirements of our laboratory.

The automatic refractometer is an automatic refractometer capable of internally setting the measured temperature. It is also called a sugar refractometer and a beverage sugar meter. It can quickly measure the refractive index, the sugar content or the concentration of various liquids. The RX-5000α automatic desktop refractometer has an electric heating module to control the temperature, so there is no need for a constant temperature water tank; concentrated juice, tomato sauce, beverage, grease, dairy products, etc. The Brix value, sugar content, dry matter content and solid content of food-like beverages are also widely used in the cultivation and guidance of fruits and vegetables, agriculture, forestry bureaus, universities, research institutes, maturity monitoring, quality improvement and development of new varieties. standard. Refer to national standards:

In order to ensure the accuracy of the results, the laboratory used a traditional refractometer to compare the 20% concentration of sucrose, the results of the comparison are as follows: Figure 3, the comparison of different instruments Instrument test value error

Rx-5000a

19.84%

19.83%

19.87%

-0.15

WYA-2S

19.3%

19.4%

19.6%

-0.5

The experiment proves that the laboratory is fully automatic

Abbe refractometer

The detection result is accurate, and the detection performance of the instrument is due to the ordinary Abbe refractometer, which has high automation degree and small influence factor by human being, and is an excellent detection instrument. Users are welcome to mail sample data for sample measurement. This article is from ATAGO China Branch

Lithium Battery

S/N
Project
General Parameter
1
Number of series
15S
2
Rated voltage
48V
3
End of discharge voltage
40V
4
Charging voltage
Recommend 51V (50.5V – 51.5V) for floating charge
Recommend 54V (53.5V – 54.5V) for equation charge
5
Continuous charge and discharge curren
≤100A
6
Internal resistance (battery pack)
≤100mΩ
7
Self-discharge rate
≤2%/month
8
range of working temperature
(≤95%R.H.)
0~65℃ charge
-20~65℃ discharge
9
Storage temperature range(≤95%R.H.)
-40~70℃
10
Positive and negative lead way
Fence Terminal 2P*2
11
Display screen
LED display, four physical buttons
12
Protective function
Overcharge, over discharge, short circuit, overload, over temperature, etc.
13
certificate
MSDS,ISO9001,CE,UN38.3,ROSH

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