Sulfate Tester, measuring the concentration of sulfate in the bath

Sulfate Tester Taiyuan Cheung technology developed by US special acid analyzer is ideal for the rapid determination of the content of chromium plating solution of sulfuric acid. The law need not to do the work curve, simple, fast, ten minutes to obtain analytical results. As a result of the standard solution calibration method overcomes the measurement error due to the uneven speed and voltage instrument instability, and many other factors, which greatly improved the reliability and accuracy of analytical results. Sulfate Tester operation easy to use, it can be used in chrome plating workshop site rapid analysis, accurate control of the content of chromium sulfate plating bath. It can also be extended to other solutions in rapid determination of sulfate content. First, the instrument: 1, a special electric centrifuge 2, two special tubes, stopper 3, owned 20 ml pipette 2, 5 ml pipette 2, a two suction ears ball, reagent preparation : Reagent Requirements: ① hydrochloric acid: AR; ② barium chloride: AR; ③ anhydrous sodium: AR content of more than 99% of reagent preparation: ① standard solution: Weigh accurately 3.620 g of anhydrous sodium sulfate, using 500 ml dissolved in distilled water into 1000 ml flask, dilute to the mark, shake back cover. This standard solution containing sulfuric acid equivalent: 2.5 g / liter. ②25% barium chloride solution: 293 g analytically pure barium chloride (BaCl · 2H2O) were dissolved in 707 ml of distilled water. ③3: 1 hydrochloric acid solution: three volumes of hydrochloric acid and a volume of distilled water. Third, the analysis methods: ① take chromium solution (if the solution is not clean to be filtered) was cooled to room temperature, 20 ml pipette above chrome 20 ml put into the centrifuge tube, pipette add 3: 1 hydrochloric acid and 5 ml, Shake the back cover, add 5 ml of 25% barium chloride solution, the back cover and shake. ② With the other 20 ml pipette standard solution of sodium to put in another 20 ml centrifuge tubes, pipette analytical grade hydrochloric acid was added 5 ml, shake the back cover, 25% barium chloride solution 5 ml, the back cover and shake. ③ the determination of the solution containing two pipe placed in weighing scales, such as weight range, the difference between the amount of distilled water is added to the low weight of the tube, so that other heavy. ④ The above two centrifuge tubes into the electric centrifuge operations in the following sequence: Close the lid after the check - Check the governor to zero position - Turn on the power - the instrument timer to 5 minutes Location - step by step the governor raised 1100 rev / min. After the centrifuge reaches the set working hours, automatic stops, the governor back to zero, turn off the power switch, remove chromium standard solution was centrifuged tubes and tubes, read out the scale values ??of these two branch tubes respectively. ⑤ calculated sulfuric acid content: acid content (g / l) = chrome liquid centrifuge tube scale value × 2.5 / standard solution IV tubes scale values, to remind: users, please follow the instructions strictly analytical method to operate, according to the description of each substance Add order to experiment, after adding hydrochloric acid to the test solution, to fully shake, otherwise it will cause unnecessary errors. After two tubes Bahrain solution, it recommended scales weigh it, be sure to maintain a balance at both ends. During the assay, be sure to progressively increase the speed, one gear of each tune, to be raised to 10 seconds before the next gear, otherwise it will not because of a fixed focal point and break the tube. Timer auto-zero, do not manually force zero. This instrument is strictly prohibited inversion.