How To Use The Measuring Pipettes

The scale straw is a precision liquid metering instrument. Pay attention to the following points in use:

1. Before use:

① Observe whether the straw is damaged and stains.

② Observe the specifications of the straw: The specifications of the straws should be equal to or approximate the volume of the solution to be absorbed.

③ Observe the word "blowing": If there is, it means that the scale is to the tip, and the tip solution needs to be blown out after liquid, otherwise it will not blow.

2, grip method: thumb and middle finger clamping straw, fingers away.

3. Remove liquid: ① Vertical liquid ② Moderate depth of liquid ③ Ear-wash ball absorption ④ The height of the liquid is higher than the scale 2-3cm ⑤ The index finger presses the straw

The upper end ⑥ scale straws are lifted from the liquid surface ⑦ observing the no bubbles in the liquid to clean the tube wall.

4. Put the liquid to the scale: ① The scale straw is vertical ② the right eye and the scale line are parallel ③ to easily open the finger (rotating scale straw) to slow down the liquid surface until the lowest point and the scale line are cut.

5. Put the liquid to the container: ① The scale straw is vertical ② the container tilt 45 ° C ③ the solution flows into the container naturally, pay attention to blowing and not blowing.

6. A straw only takes only one reagent, and immediately immerse in the water immediately after use