ASMT E934-94 易处置的塑料血清移液管.pdf

Designation: E 934-94(Reapproved 2004
Standard Specification for
Serological Pipet, Disposable Plastic
This standard is issued under the fixed designation E 934, the number immediately following the designation indicates the year of
supcrseripl epsilon (e)indicates an editorial change since the last revision or reappruldy'eses indicates the year of last reapproval. A
I adoption or, in the case of revision, the year of last revision. A number in parent
cope
4. Material and Manufacturer
1.1 This specification covers disposable plastic serological 4.1 The pipets made to this specification shall be fabricated
pipets, calibrated o deliver when measuring volumes of from crystal grade, uncolored polystyrene, or regrind of same,
in accordance with Specification D 703
dividual who reuses a disposable
pipet must bear full responsibility for its safely and efective
5. Design
hess
5.1 Shape-0.5, 1.0, and 2.0-cm pipets shall be straight and
of one-piece construction. Any cross section of a pipet taken in
2. Referenced Documents
a plane perpendicular to the longitudinal axis shall be circular
2.1 ASTM Standards: 2
5.1.1 Pipets of 5.0, 10.0, 25.0, and 50.0 cm shall be straight
D 703 pecification for Polystyrene Molding and Extrusion and may consist of one, two, or three components, the extruded
Materialss
pipet barrel, the pulled or injection molded tip, and the plain,
E 542 Practice for Calibration of Laboratory Volumetric pulled, or injection molded top end. Any cross section of a
Apparatus
pipet taken in a plane perpendicular to the longitudinal axis
E 920 Specification for Commercially Packaged Laboratory shall be circular
A
pparatus
5.2 Delivery Tips-delivery tips shall be made with a
E 921 Specification for Export Packaged Laboratory Appa-gradual taper of 10 to 40 mm. The tip end shall be reasonably
ratus
perpendicular to the longitudinal axis of the pipet, and shall be
E 1133 Practice for Performance Testing of Packaged Labo-free of internal fash
ratory Apparatus for United States Government Procure
5.3 lop Hhd-the 5, 10, 25.0, and 500-cm sizes shall have
ments
a top end with an inside diameter of 2 to 6.5 mm for a
minimum distance of 20 mm from the open end, and shall have
3. Terminology
an overall length of 24 to 28 mm. On all sizes, the top end shall
3. 1 Definitions of Terms Specific to This Standard
be suitable for plugging with filtering material. The top may be
3.1.1 accurac -the expected distribution of mean volumes flat or chamfered and must be without sharp outer edges. All
around the stated volume
top ends shall be reasonably perpendicular to the longitudinal
3.1. 2 coeficient of variation-the expected distribution of axis of the pipet. The O.D. of top end should range from 7 to
individual volumes around the mean volume
9 mi
3. 1.3 disposable pipel-such pipets will only be expected to 5. 4 Dimensions and Outflow imes-the limiting dimen-
provide their specified performance during their original use or sions and outflow times shall be as shown in Table 1. Outflow
operation
times shall be determined by means of a stopwatch on
unplugged pipets when using distilled water at 25 t 5 C
6. Markings
This specification is under the jurisdiction of ASTM Committee T:41 o