Standard substances for salt content determination (salt sample, salt standard substance, salt standard)

Standard substance for salt content determination (salt sample, salt standard substance, salt standard): Brand: Research Institute of Petrochemical Technology Selling point and use: Produced by Research Institute of Petrochemical Technology, used for Coulombic method to determine salt content in petrochemical products.

Standard substance for salt content determination (salt standard sample, salt standard substance, salt standard substance)

Brand: Petrochemical Science Research Institute

Selling point and purpose: Produced by the Institute of Petrochemical Science, used for the determination of salt content in petrochemical products by Coulombic method

Description: [Note] The following concentrations are optional: 1.0, 3.0, 5.0, 10.0, 30.0, 50.0100300 (mgNaCl/L)

【 Storage conditions 】 Keep away from light.

The characteristic value of this standard substance is the mass concentration of salt, usually expressed as the equivalent content of sodium chloride (NaCl), in mg NaCl/L or mg NaCl/kg. In crude oil analysis, the mass concentration of chloride ions (Cl?) (mg Cl?/L) is often directly expressed, and the two can be converted through a stoichiometric relationship. Its standard value is determined by two or more independent and confirmed methods (such as potentiometric titration, ion chromatography, silver nitrate volumetric method, etc.) through legal metrology technical institutions or certified laboratories, and is given after strict uniformity and stability evaluation. This value is accompanied by a scientifically assessed measurement uncertainty, ensuring that its measurement value can be reliably traced back to the national or international basic unit system, and is the benchmark for accurate measurement in relevant fields.

2、 Main functions and application scenarios

As a key measurement standard in oil extraction, refining, and water quality monitoring, its core function is to ensure the accuracy, consistency, and comparability of salt content measurement results. Specifically applied to:

Calibration and validation of analytical methods: Used for calibrating microcoulometric titrators (such as according to ASTM D3230, D6470, GB/T 6532 standards), potentiometric titrators, ion chromatographs, or automatic salt content analyzers, to verify the accuracy, precision, and detection limit of the method.

Crude oil evaluation and trade valuation: The salt content in crude oil (mainly from extracted saltwater) is an important indicator for evaluating crude oil quality, calculating desalination costs, and conducting trade settlements. Salt standard samples are the basis for ensuring the fairness of measurement of this key trade indicator.

Refining process monitoring and corrosion protection: Salts (especially magnesium chloride, calcium chloride, etc.) can hydrolyze during processing to produce hydrochloric acid, causing severe equipment corrosion and catalyst poisoning. Accurately monitoring the salt content of raw materials and intermediate products is crucial for optimizing desalination processes and ensuring safe and long-term operation of equipment.

Product quality control and compliance inspection: used to control the salt content in finished oil, naphtha, boiler feedwater, circulating water and other products to meet equipment anti-corrosion and environmental protection requirements.

Laboratory quality control and capability verification: As a core reference material for internal quality control samples and inter laboratory comparisons, it is used to monitor and enhance the laboratory's testing capabilities.