ASTM E1092-91(2000)e1
(Specification)Standard Specification for Glass Micro Folin Pipet, Disposable
Standard Specification for Glass Micro Folin Pipet, Disposable
SCOPE
1.1 This specification covers a glass disposable micro Folin pipet suitable for use in micro techniques for estimation of blood sugar by the Folin method.
1.2 The following precautionary statement pertains only to the test method portion, Section 8, of this specification. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use .
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e1
Designation: E 1092 – 91 (Reapproved 2000)
Standard Specification for
Glass Micro Folin Pipet, Disposable
This standard is issued under the fixed designation E 1092; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Keywords were added editorially in February 2001.
1. Scope 5. Materials and Manufacture
1.1 This specification covers a glass disposable micro Folin 5.1 The pipet shall be made of borosilicate glass, Type 1,
pipet suitable for use in micro techniques for estimation of Class B, or soda lime glass, Type 2, in accordance with
blood sugar by the Folin method. Specification E 438.
1.2 The following precautionary statement pertains only to
6. Physical Properties
the test method portion, Section 8, of this specification. This
6.1 Design—The micro Folin pipet shall be made of one
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user piececonstructionglasstubingthatisstraightanduniformbore
with a point pulled on one end to the dimensions as specified
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita- in Fig. X1.1.
6.2 Dimensions—The pipet shall be made of tubing with an
tions prior to use.
outside diameter (o.d.) of 2.5 6 0.1 mm with an inside
2. Referenced Documents
diameter (i.d.) of 1.8 6 0.1 mm. The uniformity of the bore
2.1 ASTM Standards: shall be6 0.05 mm throughout the straight portion of the pipet.
E 438 Specification for Glasses in Laboratory Apparatus The pipet shall be 183 6 1 mm long with all dimensions and
2.2 ISO Standard: tolerances as shown in Fig. X1.1.
1769 Laboratory Glassware—Pipettes—Color Coding 6.3 Capacity—The pipet shall be calibrated “to contain”
(T.C.) 0.1 and 0.2 mLat 20°C. Marking shall be as specified in
3. Terminology
6.5.
3.1 Definitions of Terms Specific to This Standard: 6.3.1 Accuracy(see3.1)—Theaccuracyfromstatedvolume
3.1.1 accuracy—the expected distribution of mean volumes
shall be 61.0 % for the 0.1 and 0.2-mL capacity and shall be
around the stated volume. determined as specified in 8.1.
3.1.2 coeffıcient of variation—the expected distribution of
6.3.2 Coeffıcient of Variation (see 3.2)—The coefficient of
individual volumes around the mean volume. variation from stated volume for the 0.1 and 0.2-mL capacity
3.1.3 disposable—micro Folin pipets that are intended to be
shall not exceed 1.25 % and shall be determined as specified in
used once only and then discarded. 8.1.
6.4 Graduation Lines—The pipet shall be calibrated and
NOTE 1—Such pipets will only be expected to provide their specified
marked with graduation lines at 0.1 and 0.2 mLfrom the tip of
performance during the original operation.
the pipet.The graduation lines shall be 0.3 6 0.1 mm and shall
4. Classification
completely encircle the tube.
6.5 Pipet Nomenclature—The pipet shall be marked with
4.1 This specification covers only one glass pipet as illus-
0.1 and 0.2-mL markings slightly above the graduation lines.
trated in Fig. X1.1.
The pipet may be marked with the inscription TC 20°C, or the
manufacturer’s or vendor’s name or trademark, or both.
6.6 Color Coding—The pipet shall be color coded for
This specification is under the jurisdiction of ASTM Committee E41 on
capacity as specified in ISO Standard 1769 with an “orange”
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.04 on
color band that is 6 mm 6 2 mm wide and located 16 62mm
Laboratory Furniture, Fume Hoods, and Related Equipment.
Current edition approved Aug. 15, 1991. Published October 1991. Originally
from the top of the pipet as shown in Fig. X1.1.
published as E 1092 – 86. Last previous edition E 1092 – 86.
6.7 Markings Permanency—Graduation lines, inscriptions,
Annual Book of ASTM Standards, Vol 14.04.
and numerical markings on the pipet (other than the color code
Available from ISO, 1 Rue de Varembe, Case Postale 56, Crt 1221, Geneva 20,
Switzerland. band) shall be black in color. All markings may not be of
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E 1092
permanentnaturebutmustpossesssufficientstabilitytoendure Values of Z for water are given in the appendix.
normal transportation and its expected one-time use and must
8.3 Capacity Deviation (single pipet)—In accordance with
meet the test requirements as specified in 8.5.
the methods outlined, capacity deviation is the difference
6.8 Lot Control—Alot or control number shall be indicated
between the stated capacity and the observed capacity of the
onthepipetcontainerpackage.Thislotorcontrolnumbe
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