Summary of YT-7304A Acid Value Tester for Petroleum Products and Lubricants:
The sample is dissolved in a mixed solvent of toluene and isopropanol containing a small amount of water, and potentiometric titration is carried out using potassium hydroxide isopropanol standard solution as the titrant. The electrode pair used is a glass indicator electrode and a calomel reference electrode. Only obvious jump points are taken as the endpoint on the manually drawn or automatically drawn potentiometric titration dose curve. If there are no obvious jump points, the corresponding new non-aqueous acidic or alkaline buffer solution's potential value is taken as the titration endpoint.

Oil product and lubricant acid value tester YT-7304A main technical indicators:
1. Measurement range: MV: 0~± 1999 PH: 0~14.00
2. Measurement accuracy: MV: 0.1% F.S PH: ± 0.01
3. Control accuracy: ± 0.03PH or ± 3mv
4. Input impedance: not less than 1 × 1012 Ω

The significance and use of YT-7304A acid value tester for petroleum products and lubricants:
1. The acidic components of new or used oil products refer to the degradation products such as oxidation products of additives or oil products during use. These substances can be measured by alkaline titration to determine their relative content. The acid value is the amount of these substances in the oil product measured under specified conditions. The acid value can be used to control the quality of lubricating oil and sometimes also to determine the degradation of lubricating oil during use. However, the acid value as a scrap indicator of lubricating oil must be determined through experience
2. Due to the various oxidation products that can affect the acid value, and the significant changes in organic matter under corrosive conditions, this method cannot be used to predict the corrosion performance of oil products during use. For example, there is no necessary relationship between acid value and the degree of metal corrosion caused by oil products.