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Welcome to freezing cryo tube and leave relevant information, our professional engineers will contact you as soon as possible!.4 beaker, 50mL 4. Steps for measuring the pH value of common makeup water in the market: This experiment uses common makeup water in the market as a sample,

a high-precision ST5000 pH meter, and an easy-to-use composite glass electrode STMICRO5 (a combination of a pH glass electrode and a reference electrode) as a pH measuring instrument.3 Sample measurement Wash the electrode with water, dry it with filter paper, insert the electrode into the sample to be tested, start the stirrer, wait for the acidity meter reading to stabilize for 1 minute, stop the stirrer, and read the pH value directly from the instrument. . iv)

After removing the electrode from the first calibration solution and washing it with deionized water, wipe it and place it in the second calibration solution, click 'Next', wait for the value to stabilize for about 30s, and complete the calibration operation of the second pH point.2. The pH value can be read directly on the instrument. 'Cosmetics Safety Technical Specification' Application scope of pH measurement method This method specifies the pH value of cosmetics with a pH meter. This method is suitable for measuring the pH value of cosmetics. (STMICRO5 electrode application picture) ST5000pH meter calibration steps: i) Turn on the power and light up the meter screen.

This solution has a pH of 4. upset. The rapid development of the cosmetics industry, while the use of cosmetics is becoming more and more widespread, its safety incidents also frequently occur.1 Precision acidity meter (accuracy 0.5 balance As a laboratory equipment supplier with a long history of 111 years, Ohaus can provide users with Provide high-precision pH meter, electrode and stable and reliable Tianping products. The meter has no buttons and is intuitive and convenient to operate.55g of disodium hydrogen phosphate (Na2HPO4) at 105 ° C for 2h, and dissolve in water.3 Sodium borate standard buffer solution: Weigh 3.18 to perform three-point calibration on the ST5000 meter.
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