Automatic Potentiometric Titration Edible Oil Testing Equipment ST-13A

Place of Origin CHINA
Brand Name Shengtai Instrument
Certification ISO9001
Model Number ST-13A
Minimum Order Quantity 1
Packaging Details wooden case
Delivery Time 7-15work-days
Payment Terms T/T
Supply Ability 100000sets/year

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Product Details
MODEL ST-13A Measurement Range ≥ 0.001 MgKOH/g
Potential Measurement Range - 2000.0~+2000.0 MV Minimum Titration Volume 0.001 ML
Burette Accuracy ± 0.2% F • S
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Potentiometric Titration Edible Oil Testing Equipment


ST-13A automatic potentiometric titrator

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Product Description

Determination Of Acid Value In Food By ST-13A Automatic Potentiometric Titration Edible Oil Testing Equipment

The ST-13A automatic potentiometric titrator is designed in accordance with standards such as the determination of acid value in foods (GB5009.229-2016), the cold solvent automatic potentiometric titration method (the second method), and the determination of peroxide value in foods (GB5009.229-2019).


The instrument uses potentiometric titration to automatically identify the titration end point and automatically calculate the results. This instrument is suitable for the determination of acid value in various samples such as food acid value, which is one of the important indicators for determining the quality of edible oil. The titration system uses imported components, which are processed from corrosion resistant materials, with accurate measurement results and long service life.


Main technical parameters and features:

◆ Universal microcomputer and operating system, Windows 10 operating system, man-machine dialogue mode for operation, clear steps, simple and easy to operate; Special software with Chinese window interface, mouse and keyboard operation, human-computer dialogue easy to understand.

◆ Real-time display of potential curve (E-V), first derivative curve (dE/dV), electrode potential (E), titration volume (V), and titration result

◆ Full process titration data browsing and powerful data processing functions facilitate the re processing of results; Mass storage of titration results, data, and curves. The titration process data can be saved as an Excel file for future query

◆ Automatically print curves, results, and titration data

◆ Dynamic equivalent point titration (DET), equivalent equivalent point titration (MET), and preset end point potentiometric titration (SET)

◆ Fully automatic "end point" discrimination, effectively filtering out false "end points"

◆ Automatic cleaning, automatic liquid replenishment, automatic constant value liquid addition

◆ Measurement range: ≥ 0.001 mgKOH/g

◆ Potential measurement range: - 2000.0~+2000.0 mV

Basic error of electronic unit: 0.1% F • S ± 0.1 mV

Input impedance: ≥ 1 × 1012 Ω

◆ Burette volume: 10mL

◆ Minimum titration volume: 0.001 mL

◆ Burette accuracy: ± 0.2% F • S

◆ Precision: meeting or superior to relevant standards

◆ Size: 350 * 280 * 380mm

◆ Weight: 18kg


Packaging and Delivery


Goods packaging: standard wooden or cardboard boxes.

Internal packaging: Elastic pearl cotton packaging products, hard wood+strong bandage fixed corners.



S/N Name Quantity Unit remarks
1 Host 1 set  
2 Microcomputer host 1 set User provided
3 Keyboard 1 set User provided
4 printer 1 set User provided
5 A magnetic stirrer 1 set  
6 Serial communication line 1 piece  
7 Print cable 1 piece User provided
8 Short circuit plug 1 piece  
9 Fuse (1.5A) 2 piece In the host power socket
10 Reference electrode 1 piece Specially made by our factory
11 Measuring electrode 1 piece Specially made by our factory
12 Magnetic stirrer 1 piece  
13 power cord 1 piece  
14 instruction manual 1 copy  
15 Packing list 1 copy  
16 certificate 1 copy  

The reagents for the determination of acid value by potentiometric titration are as follows: (The reagents are prepared by themselves)


Isopropanol (C3H8O)

Ether (C4H10O)

Anhydrous ether (C4H10O)

Petroleum ether, boiling range from 30 ℃ to 60 ℃

Reagent preparation

● Potassium hydroxide standard titration aqueous solution with a concentration of 0.1 mol/L, prepared and calibrated in accordance with the requirements of GB/T601 standard, and commercially available reagents can also be purchased.

● Ether isopropanol mixture: Ether isopropanol=1+1500ml of ether and 500ml of isopropanol are fully miscible and mixed, ready to use.

The peroxide value reagents for potentiometric titration are as follows (prepared by the reagent itself) (extracted from the national standard)

9.1 Reagents

9.1.1 Glacial acetic acid.

9.1.2 Isooctane firing.

9.1.3 Potassium Iodide.

9.1.4 Sodium thiosulfate.

9.1.5 Potassium dichromate: working standard reagent.

9.2 Reagent preparation

9.2.1 Isooctane glacial acetic acid mixture (40+60): Measure 40 mL of isooctane, add 60 ml, and mix with glacial acetic acid.

9.2.2 Saturated potassium iodide solution: Weigh 20 g of potassium iodide, add 10 mL of newly boiled and cooled water, mix and store in a brown bottle, and store in a dark place for standby. Ensure that saturated potassium iodide crystals are present in the solution. Pre use inspection: In 30 mL of isooctane glacial acetic acid mixture.

Add 0.5 mL of saturated potassium iodide solution and 2 drops of 1% starch indicator to (9.2.1). If blue color appears and requires more than 1 drop of 0.01 mol/1 sodium thiosulfate solution to eliminate it, this solution should be prepared again.

9.3 Preparation of standard solution

9.3.1 0.1 mol/L sodium thiosulfate standard solution: Weigh 26 g of sodium thiosulfate and 0.2 g of anhydrous sodium carbonate, dissolve in 100 ml of water, slowly boil for 10 minutes to cool. After two weeks of storage, filter and calibrate.

9.3.2 0.01 mol/L sodium thiosulfate standard solution: prepared by diluting 9.3.1 with freshly boiled and cooled water. Prepare before use.

Automatic Potentiometric Titration Edible Oil Testing Equipment ST-13A 0Automatic Potentiometric Titration Edible Oil Testing Equipment ST-13A 1Automatic Potentiometric Titration Edible Oil Testing Equipment ST-13A 2

Company Introduction

Shandong Shengtai Instruments Co., Ltd. is specialized in the research and production of experimental testing instruments and industrial testing instruments. It is a professional instrument company integrating instrument research and development, manufacturing, sales and service. Its products are widely used in food, flour, grain and oil, Feed, electricity, petrochemical, industrial oil, aerospace, coal quality and other industries.

For more than 10 years, Shengtai has always been adhering to the "first-class service, customer first" as the purpose, "reasonable price, honesty and trustworthiness" as the business policy. Adhere to technical innovation, with rich knowledge of the technical team and experienced, thoughtful after-sales service team.

Shengtai instrument as one of the most large-scale and competitive enterprises in the industry, with the strength of technology research and development, professional technical knowledge and innovative design concept, in the model improvement, Significant technical breakthrough has been achieved in the development of function expansion and intelligent control system.

OUR service

After-sales service commitment, our company to sell the product after-sales service commitment: warranty period of one year, long-term technical support outside the warranty period. During the warranty period, the seller shall bear the cost of the replacement of the equipment, the freight and maintenance of the instrument; outside the warranty period, the seller shall waive the maintenance fee and charge only the cost of the basic materials and freight charges when the instrument is malfunctioning and the seller shall not charge the maintenance fee during the warranty period.


Contact us

Shandong Shengtai Instrument Co.,ltd

ADD:6-8 time base NO.15 lanxiang road tianqiao Area Jinan city

TEL:+86 0531-85919987 85929987

FAX:+86 0531-85957987

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