PH / orp meter standard buffer preparation and preservation ⒈pH standard materials should be stored in a dry place, it will happen as deliquescence mixed phosphate pH standard material humidity in the air, once deliquescence occurs, pH standard material that can not be used . ⒉ preparation of pH using a secondary standard solution should be distilled or deionized water. If it is used for measuring pH 0.1, you can use an ordinary distilled water. ⒊ preparation of pH standard solution should be used to dilute a small beaker PH meter PH meter to reduce the stick in the wall of the beaker pH standard solution. PH standard substance stored in plastic bags or other containers, in addition to be clean down outside PH meter PH meter what role, further washed several times with distilled water, then the pH of the solution was poured into a standard formulation in order to ensure the pH standard solution prepared accurate. ⒋ preparation of a good standard buffer solution can be stored for 2-3 months in general, if there is muddy, moldy or when precipitation and other phenomena, can not continue to use. ⒌ standard alkaline solution should be packed in polyethylene bottles sealed. Prevent carbonate formation after carbon dioxide entering the standard solution, lowering its pH. PH meter Note: a buffer calibration solution pH 6.86 for the first time with the second buffer solution with a pH close to the test solution. If the test solution is acidic buffer solution should be selected pH4.00; if the test solution is alkaline, then choose pH9.18 of buffer solution. b. If the room temperature 超过 5 ℃, need to re-calibrate. c. can not touch the thermometer to measure the temperature at the bottom of the vessel around and where to use PH meter PH meter, so as to avoid temperature measurement errors. d. each cleaning wash with distilled doing with PH meter PH meter, and every dry to prevent changes in the concentration of buffer solution, which affects the calibration value. e. If the slope and orientation do not show 100%, you will need to re-calibrate. f. pH meter with a timely manner after the top of the hole with a rubber Sese, rinse the electrode with filter paper or absorbent paper electrode (including the crystal ball) sucking up the water and placed on the motor protection kit, and to ensure that the protective cover electrode submerged within the glass sphere. PH meter PH meter PH meter What _PH hundred dollars _ a technology provided by Changzhou Best Technology Limited. Changzhou Best Technology Limited (www.czbckj.com) strong, credible, in Changzhou, Jiangsu chemical instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead one hundred innovative ideas into technology and you hand into the brilliant, for a better future!