ASTM E1092-91(2010)

Standard Specification for Glass Micro Folin Pipet, Disposable

ABSTRACT
This specification covers the classification, physical requirements, and testing of disposable glass micro Folin pipets suitable for use in micro techniques for the estimation of blood sugar by the Folin method. The pipets shall be made of Type 1, Class B borosilicate glass, or Type 2 soda lime glass. The physical properties to which the pipets shall adhere are design, dimensions, graduation lines, pipet nomenclature, color coding, marking permanency, and lot control. The pipets shall also be tested for capacity accuracy and coefficient of variation, and marking permanency.
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 values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 concerns, 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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2010
• ICS: 11.100.99 - Other standards related to laboratory medicine
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

Relations

• Replaces: ASTM E1092-91(2005) - Standard Specification for Glass Micro Folin Pipet, Disposable
• Effective Date: 01-Sep-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E1092 −91(Reapproved 2010)
Standard Specification for
Glass Micro Folin Pipet, Disposable
This standard is issued under the fixed designation E1092; 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 (´) indicates an editorial change since the last revision or reapproval.
performance during the original operation.
1. Scope
1.1 This specification covers a glass disposable micro Folin
4. Classification
pipet suitable for use in micro techniques for estimation of
4.1 This specification covers only one glass pipet as illus-
blood sugar by the Folin method.
trated in Fig. X1.1.
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
5. Materials and Manufacture
standard.
5.1 The pipet shall be made of borosilicate glass, Type 1,
1.3 The following precautionary statement pertains only to
Class B, or soda lime glass, Type 2, in accordance with
the test method portion, Section 8, of this specification. This
Specification E438.
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user
6. Physical Properties
of this standard to establish appropriate safety and health
6.1 Design—The micro Folin pipet shall be made of one
practices and determine the applicability of regulatory limita-
piececonstructionglasstubingthatisstraightanduniformbore
tions prior to use.
with a point pulled on one end to the dimensions as specified
in Fig. X1.1.
2. Referenced Documents
6.2 Dimensions—The pipet shall be made of tubing with an
2.1 ASTM Standards:
outside diameter (o.d.) of 2.5 6 0.1 mm with an inside
E438 Specification for Glasses in Laboratory Apparatus
diameter (i.d.) of 1.8 6 0.1 mm. The uniformity of the bore
2.2 ISO Standard:
shall be 60.05 mm throughout the straight portion of the pipet.
1769 Laboratory Glassware—Pipettes—Color Coding
The pipet shall be 183 6 1 mm long with all dimensions and
3. Terminology tolerances as shown in Fig. X1.1.
6.3 Capacity—The pipet shall be calibrated “to contain”
3.1 Definitions of Terms Specific to This Standard:
3.1.1 accuracy, n—the expected distribution of mean vol- (T.C.) 0.1 and 0.2 mLat 20°C. Marking shall be as specified in
6.5.
umes around the stated volume.
6.3.1 Accuracy (see 3.1.1)—The accuracy from stated vol-
3.1.2 coeffıcient of variation, n—theexpecteddistributionof
ume shall be 61.0 % for the 0.1 and 0.2-mLcapacity and shall
individual volumes around the mean volume.
be determined as specified in 8.1.
3.1.3 disposable, n—micro Folin pipets that are intended to
6.3.2 Coeffıcient of Variation (see 3.1.2)—The coefficient of
be used once only and then discarded.
variation from stated volume for the 0.1 and 0.2-mL capacity
NOTE 1—Such pipets will only be expected to provide their specified shall not exceed 1.25 % and shall be determined as specified in
8.1.
6.4 Graduation Lines—The pipet shall be calibrated and
This specification is under the jurisdiction of ASTM Committee E41 on
marked with graduation lines at 0.1 and 0.2 mLfrom the tip of
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
Apparatus.
the pipet.The graduation lines shall be 0.3 6 0.1 mm and shall
Current edition approved Sept. 1, 2010. Published September 2010. Originally
completely encircle the tube.
approved in 1986. Last previous edition approved in 2005 as E1092 – 91 (2005).
DOI: 10.1520/E1092-91R10.
6.5 Pipet Nomenclature—The pipet shall be marked with
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
0.1 and 0.2-mL markings slightly above the graduation lines.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
The pipet may be marked with the inscription TC 20°C, or the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. manufacturer’s or vendor’s name or trademark, or both.
Available from International Organization for Standardization (ISO), 1, ch. de
6.6 Color Coding—The pipet shall be color coded for
la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://
www.iso.ch. capacity as specified in ISO Standard 1769 with an “orange”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E1092−91 (2010)
colorbandthatis6 62mmwideandlocated16 62mmfrom
Z = apparent specific volume of liquid (water).
the top of the pipet as shown in Fig. X1.1.
Values of Z for water are given in the appendix.
6.7 Marking Permanency—Graduation lines, inscriptions,
8.3 Capacity Deviation (single pipet)—In accordance with
and numerical markings on the pipet (other than the color code
the methods outlined, capacity deviation is the difference
band) shall be black in color. All markings may not be of
between the stated capacity and the observed capacity of the
permanentnaturebutmustpossesssufficientstabilitytoendure
pipet as follows:
normal transportation and its expected one-time use and must
meet the test requireme
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