Main Influencing Factors of Determination of Sulfide in Water
The sulfide in water is mainly produced by bacteria reducing sulfate under anaerobic conditions, and some are produced by the decomposition of sulfur-containing organic matter. Sulfides mainly exist in water as soluble H2S, HS-, and S2-. Soluble metal sulfides, soluble sulfides, and unionized organic and inorganic sulfides in suspended matter are also the main forms of sulfides in water. As an important indicator for judging the degree of water pollution, the higher the value of sulfide, the more serious the water pollution. Sulfide is one of the harmful components in cement. Too much sulfide in cement will cause the strength of cement to decrease, which is not conducive to the durability of concrete. The sulfide in cement mainly comes from raw materials such as slag. A reducing atmosphere is generated during clinker calcination, which affects the quality of clinker and reduces the effective components in clinker. At the same time, the calculation of granulated blast furnace slag content in Method 2 of GB/T12960-2019 'Quantitative Determination of Cement Components' also involves the determination of sulfide, so the determination of sulfide is of great significance. Generally, the determination of sulfide content in cement is determined by the iodometric method, that is, under reducing conditions, the sample is decomposed with hydrochloric acid, and the hydrogen sulfide produced is collected in the ammoniacal zinc sulfate solution, and then the ammonia is determined by the iodometric method. Hydrogen sulfide content in neutral zinc sulfate solution. The sulfide rapid detector can accurately and quickly measure the content of sulfide in water. It adopts imported high-performance, long-life, high-brightness cold light source, and the data is stable and reliable; microcomputer design, easy and fast operation. Product features: 1. Fast and accurate determination of sulfide content value, direct reading of concentration. 2. Adopt imported light source, narrow-band interference, software trap and other advanced technologies, with high accuracy and good stability. 3. It adopts 5.0-inch large-screen LCD liquid crystal display, which is convenient and intuitive. 4. One-key storage function, 1800 sets of data storage function. 5. It has a one-key export function and can be connected to a computer to facilitate data management and analysis. 6. Built-in standard detection program, which can be directly selected and used; convenient and fast. 7. With a USB interface, the data can be transmitted to the computer, which is convenient for data management. 8. Equipped with a thermal printer, the measured data can be printed in real time for easy storage.