Anti-pollution rubber-head burette
A plastic dropper and anti-pollution technology, applied in the field of chemical instruments, can solve the problems of easy backflow pollution and high requirements for the operation of the plastic dropper
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[0009] Such as figure 1 As shown, a kind of anti-pollution plastic tip dropper comprises a plastic tip dropper body 1, wherein a funnel-shaped glass tube 3 is arranged on the inside top of the glass tube 2 of the plastic tip dropper body 1, and the funnel-shaped glass tube The top of 3 is sealed and connected with the top of glass tube 2, the bottom of the lower tube 4 of the funnel-shaped glass tube 3 is an open structure and the radius of the lower tube 4 is smaller than the minimum radius of the rubber dropper body 1, the funnel-shaped glass tube 3 The length is less than one-third of the length of the rubber head dropper body 1 .
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