National standards for copper and copper alloys - Standards for strips and foils
GB/T2059-2000 Copper and copper alloy strips GB/T2059-1989 GB/T2060-1989 GB/T2062-1989 GB/T2066-1989 GB/T2071-1989 GB/T14595-1989 GB/T14596-1989 GB/T2061-2004 Radiator heat sinks for pure copper, brass with foil GB/T2061-1980 GB/T2069-1980 Aluminum white copper (BA16-1.5, BA113-3 band) GB/T5187-1985 Pure copper foil YB/T462-1964 GB/T5188-85 (1997) Brass foil YB/T559-1965 GB/T5189-85 (1997) Bronze foil YB/T707-1970 GB/T5190-85 (1997) Nickel and copper foil YB/T708-1970 GB/T5230-1995 Electrolytic copper foil GB/T5230-1985 GB/T11087-2001 Radiator cooling tube special brass band GB/T11087-1989 GB/T11089-1989 Special lead brass band YB/T706-1980 GB/T11090-1989 Detonator copper and copper alloy strip YB/T706-1980 GB/T11091-1989 Copper tape for cables YB/T704-1980 GB/T15714-1995 H65 brass band for welded pipe GB/T18813-2002 Transformer copper tape YS/T29-1992 Capacitor special brass band GB/T2534-1981 YS/T30-1992 Yarn tube brass band GB/T2533-1981 YS/T323-2002 Bronze strips and strips YB/T552-1975 YS/T466-2003 Test method for heat resistance of copper strips and foils Hardness method The commonly used Pipette kits are mainly composed of a pipette and a pipette tip. The pipette tip is a single empty 1000 ul pipette tips,200ul pipette tips,10ul pipette tips,low retention pipette tips Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yonyuepcr.com
Cavity reservoir; the pipette uses the principle of air displacement and controls the maximum displacement of the piston by rotating a screw with an ultra-fine thread
displacement, and then control the amount of liquid suction. There are the following problems when using the above kit for suction: 1. The suction volume is controlled by the pipette
After the pipette is sterilized or used for a period of time, it is easy to cause "hidden" failures, which cause the operator to be difficult to detect.
The actual suction volume is inaccurate, and it needs to be adjusted frequently, and the operation is cumbersome and time-consuming; 2. To improve the pipetting accuracy, the operator's
The operation requirements are high, and it is easily affected by factors such as the suction speed, the depth of the tip below the liquid level, and the inclination angle of the pipette.
The actual suction volume will be heard; 3. The actual suction volume will be affected because the suction head cover is not tight and leaking, and it will not be easily detected; 4.
When performing experiments that require high accuracy, such as analysis, in the operation of equal volume aspiration of liquids with different densities, the actual
The actual suction volume will be affected by the density itself; 5. In order to improve the accuracy, this type of pipette needs to carry out high
Cost-optimized design results in extremely high pipette costs.