Zhengyi volumetric flask 25ml

Zhengyi volumetric flask 25ml, with binding rope, custom traceability number, and third-party measurement certificate

* Engraved numbering, clear font, replacing traditional labels, avoidingShedding and reducing pollution;

* With a binding rope, the stopper corresponds to the bottle one by one, saving time and effort, durable, and easy to dry;

* Integrated identification information that does not fade;

* Optional beltCNASMeasurement certificate, which can be used upon receipt (provided by a qualified third-party service, with additional measurement fees);

* Package inspection, package damage.

Precautions for using volumetric flasks：

‌Inspection and cleaningBefore use, it is necessary to check for any leakage and carefully clean. ‌

‌Holding methodWhen injecting liquid, only hold the bottleneck on the marked line to prevent temperature changes. ‌

‌Liquid level observationWhen determining the liquid level position, the line of sight and the marking line should be at the same horizontal position. ‌

‌Dissolution and TransferSolute cannot be dissolved in a volumetric flask, it should be transferred after dissolution, and the total amount of solvent used to wash the beaker should not exceed the scale line. ‌

‌temperature controlThe volumetric flask cannot be heated, and the hot solution needs to be cooled to room temperature before transfer. ‌

‌Storage and maintenanceSolution, especially alkaline solution, should not be stored for a long time. After use, it should be washed clean in a timely manner, the bottle stopper should be plugged, and a piece of paper should be sandwiched between the stopper and the bottle mouth. ‌

‌Choose a suitable volumetric flaskIf preparing substances that are easily decomposed by light, brown volumetric flasks should be selected. ‌