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Standard No.: ASTM F1507-1999 Chinese Standard Name: Standard Specification for Surge Suppressors for Shipboard Use English Standard Name: Standard Specification for Surge Suppressors for Shipboard Use Release Date: 1999/12/31 12:00:00 Implementation Date: 1999/12/31 12:00:00 International Standard Classification Number: 29.120.50 Fuses and other current protection

There are several detection methods available for ion chromatography suppressors, among which conductivity detection is the main one because it has universality for ions in aqueous solutions. However, due to its universality, as a detector for ion chromatography, it itself brings a problem, that is, it has a high detection signal for the eluent, which makes it difficult to recognize the signal generated by the sample ions during rinsing . The simple and clever solution for ion chromatography suppressors is to use weakly acidic alkali metal salts as the eluent for separating anions, and inorganic acids as the eluent for separating cations. When separating anions, the eluent passes through a hydrogen (H+) type strong acidic cation exchange resin filled column placed between the separation column and the detector; When analyzing cations, OH - type strong alkaline anion exchange resin columns are used. In this way, the weak acid salts in the anion eluent are protonated to form weak acids; The strong acids in the cationic washing solution are neutralized to form water, greatly reducing the conductivity of the washing solution itself. This type of column is called a suppression column. The technical advantages of ion chromatography suppressors include: 1. Split type building block structure mode, split type mode, with good anti-interference and scalability. And it can be equipped with ultraviolet/visible light detectors, electrochemical detectors, or pH and conductivity modules to meet the requirements of unconventional sample analysis and simultaneous analysis of multiple data, achieving one machine with multiple functions. 2. The highly sensitive circuit adopts industrial grade electrical components and * * * shielding technology, which improves the detection sensitivity and stability of the instrument and can meet the diverse detection needs of users. 3. The automatic signal acquisition system links the injection valve with the host circuit to automatically identify signals when the valve switches positions, activate software analysis functions, and avoid errors caused by manual operation. 4. When the entire system of the flow path is shut down for a certain period of time, it will automatically start the flow path to flush all system components regularly, avoiding pipeline crystallization and achieving maintenance purposes. 5. The intelligent constant temperature system provides constant temperature protection for the separation column during detection and analysis, enabling it to achieve good separation results; Automatically start heating up to the ideal temperature suitable for storing the separation column under low temperature conditions (including shutdown conditions), extending the service life of the separation column

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