Acid Value Tester

The acid value tester uses the principle of neutralization reaction to titrate free acids in samples with a standard alkali solution, using phenolphthalein as an indicator to determine the endpoint. It is used to detect the acid content in substances such as oils, fats, and resins, and to monitor the quality of raw materials and products in the chemical and food industries.
Selection
When selecting, consider matching the sample characteristics with the detection range, ensuring the titration accuracy meets standard requirements, and the operation interface is user-friendly. Pay attention to the durability of electrodes and burettes, ensure the instrument has data storage capabilities, and that maintenance costs and consumable supply align with the frequency of use.

Terms

Standards

Instruments

Measurement range 0.0-15 ppm, accuracy +/- 0.3ppm +/- 5% reading, using LED@525nm Illuminant, based on amino acid method for rapid detection of phosphoric acid salts, easy to operate and suitable for laboratory and field.

$ 209.00

Using 525nm LED Illuminant, Measurement range 0.0-30 ppm, accuracy +/- 1.0ppm, based on amino acid method to achieve high Sensitivity phosphoric acid salt detection, suitable for a variety of water quality environments.

$ 215.00

The samples were treated by acid-base cooking method, and 6 samples could be measured each time. The repeatability error of the absolute value of crude fiber content below 10% did not exceed 0.4%, and the determination time was about 100 minutes.

$ 912.00

The PHY Glass membrane is used to withstand strong acid and alkali corrosion, and the membrane Impedance is less than 500MΩ to ensure the measurement Stability; the porous PTFE liquid complex and 3M KCl gel electrolysis solution are designed to improve the anti-pollution performance, suitable for 0-130 ℃ high temperature environment.

$ 296.00

Using stainless steel material to ensure acid and alkaline resistance, wet film thickness 100μm accuracy of +/- 2μm, suitable for a variety of pRoduct coating and in line with industry standards.

$ 1406.00

The stainless steel material has acid and alkaline resistance, wet film thickness 75μm accuracy +/- 2μm, suitable for coating applications of various substrates.

$ 1406.00

Using stainless steel material with acid and alkaline resistance, wet film thickness 250μm accuracy of +/- 2μm, suitable for flat and sturdy substrate film operation.

$ 1406.00

Made of stainless steel with good acid and alkaline resistance, wet film thickness 150μm accuracy +/- 2μm, suitable for a variety of pRoducts on flat substrates Spreader applications.

$ 1406.00

Using stainless steel material acid and alkali resistance, wet film thickness 25μm accuracy +/- 2μm, suitable for flat substrate coating, in line with ASTM multiple test standards.

$ 1406.00

Using 525nm LED Illuminant to ensure Stability, Measurement range 0-200ppb, accuracy +/- 5ppb, support ascorbic acid detection, with Automatic calibration verification function.

$ 215.00

Using stainless steel material acid and alkali, wet film thickness 50μm accuracy +/- 2μm, suitable for flat and solid substrate coating different pRoducts, surface polishing.

$ 1406.00

Microcrystalline Glass panel resistant to strong acid and alkali, low expansion coefficient to ensure high temperature without deformation, the highest Operating temperature 450 ℃, surrounded by 316L stainless steel material comprehensive corrosion resistance.

$ 643.00

Microcrystalline Glass panel is resistant to strong acid and alkali, low expansion coefficient to ensure no deformation at high temperature; Operating temperature 450 ℃, ceramic fiber insulation material is lightweight and efficient, and 316L stainless steel around is corrosion resistant.

$ 612.00

Measurement accuracy up to +/- 0.05PH, Repeatability +/- 0.03PH, equipped with LCD large screen display, support data retention and automatic temperature compensation function, easy and reliable operation.

$ 105.00

Microcrystalline Glass panel resistant to strong acid and alkali, low expansion coefficient to ensure high temperature without deformation, the highest Operating temperature 450 ℃, 316L stainless steel material comprehensive anti-corrosion, ceramic fiber insulation material lightweight and efficient.

$ 403.00

Articles

Determination of free amino acid content in protein solutions using a microtitration apparatus.
This article introduces a method for determining the free amino acid content in protein solutions using a microtiter plate reader. It is based on the ninhydrin color reaction, where amino acids react with the reagent under specific conditions to produce colored compounds, and the concentration is calculated by measuring the absorbance.
Operating Specifications for the Determination of Hexavalent Chromium Content in Wastewater Using Colorimetric Titration Apparatus
This article introduces the standard operating procedure for determining hexavalent chromium content in wastewater using a colorimetric titrator. The method is based on the reaction between hexavalent chromium and diphenylcarbazide under acidic conditions to form a purplish-red complex, with the titration endpoint determined by monitoring changes in absorbance at a wavelength of 540 nanometers.
Wavelength selection for the determination of sulfate content in water quality using photometric titrator
This article discusses how to select the wavelength when using a photometric titrator to determine the sulfate content in water. The core issue lies in the fact that wavelength selection directly affects the accuracy and anti-interference capability of the detection.
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This article introduces a method for determining the concentration of hydrogen peroxide using an automatic potentiometric titrator. It is based on the redox reaction between potassium permanganate and hydrogen peroxide under acidic conditions, with the titration endpoint automatically determined by the abrupt change in potential.
Key operational points for determining the acid value of oils and fats using potentiometric titration.
This article introduces the key operational points for determining the acid value of oils and fats using potentiometric titration. The method principle involves dissolving the oil or fat sample, titrating it with a standard alkaline solution, automatically determining the endpoint based on the potential jump, and then calculating the acid value using the formula.
Application of Automatic Potentiometric Titrator in Chloride Ion Detection in Drinking Water
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Salt spray test chamber detects the corrosion resistance of coatings.
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Atomic Absorption Spectrometer for Determining Heavy Metal Content in Coatings
This article introduces a method for determining the content of heavy metals such as lead, cadmium, chromium, and mercury in coatings using atomic absorption spectroscopy. The method is based on the absorption of characteristic wavelength light by atoms for quantification. It requires acid digestion pretreatment of coating samples and optimization of instrument conditions to improve accuracy.
Applicable Scenarios for Neutral Salt Spray and Copper-Accelerated Acetic Acid Salt Spray Tests
Neutral salt spray testing and copper-accelerated acetic acid salt spray testing are both accelerated methods used to evaluate the corrosion resistance of materials, simulating saline environments to predict long-term performance. The neutral salt spray test uses a neutral sodium chloride solution, which causes relatively mild corrosion and is suitable for general metals and coatings, such as automotive parts.
When to use three-point calibration versus two-point calibration for pH meters?
The calibration of a pH meter is performed to determine the actual zero potential and slope of the electrode, enabling accurate measurement of the acidity or alkalinity of a solution. Two-point calibration is commonly used for daily measurements within a narrow range, while three-point calibration is employed for higher accuracy requirements.
Key operational points for determining chloride ion content in water using automatic potentiometric titrators
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