Laboratory Glassware — Separating Funnels and Dropping Funnels

BRITISH STANDARD BS ISO 4800:1998

Laboratory glassware— Separating funnels and dropping funnels

ICS 71.040.20 BSISO4800:1998

National foreword

This BritishStandard reproduces verbatim ISO4800:1998 and implements it as the UK national standard. It supersedes BS2021:1980 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee LBI/36, Laboratory glassware and related apparatus, to Subcommittee LBI/36/2, General laboratory glass and plastics ware, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The BritishStandards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pagesii to iv, pages1 to6, an inside back cover and abackcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. This BritishStandard, having been prepared under the Amendments issued since publication directionof the Sector Committeefor Materials and Amd. No. Date Comments Chemicals, was published underthe authority of the Standards Committee and comesinto effect on 15April1999

ISBN 0 580 32357 9 BSISO4800:1998

Contents

Page National foreword Inside front cover Foreword iii Text of ISO4800 1

BSISO4800:1998

Contents Page Foreword iii Introduction 1 1 Scope 1 2 Normative references 1 3 Types and sizes 1 4 Materials 1 5 Construction 1 6 Marking 2 7 Dimensions 3 7.1 Type 1 — Separating funnels (conical type) 3 7.2 Type 2 — Separating funnels (pear-shaped type) 4 7.3 Type 3 — Dropping funnels 5 7.4 Type 4 — Graduated dropping funnels 6 7.4.1 Graduation 6 7.4.2 Total capacity based on average wall thickness 6 7.4.3 Scales 6 Bibliography Inside back cover Figure 1 — Conical separating funnel 3 Figure 2 — Pear-shaped separating funnel 4 Figure 3 — Dropping funnels 5 Figure 4 — Scales for graduated dropping funnels 6 Table 1 — Dimensions of conical separating funnels 3 Table 2 — Dimensions of pear-shaped separating funnels 4 Table 3 — Dimensions of dropping funnels 5 Table 4 — Graduation of dropping funnels 6 Table 5 — Total capacity of dropping funnels 6

Descriptors: Laboratory equipment, laboratory glassware, funnels, separating funnels, dropping funnels, specifications, dimensions, marking.

ii © BSI 03-2000 BSISO4800:1998

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO4800 was developed by Technical Committee ISO/TC48, Laboratory glassware and related apparatus, Subcommittee SC2, General laboratory glassware (other than measuring). This second edition cancels and replaces the first edition (ISO4800:1977) by incorporating the following changes: a) dimensions and tolerances have been brought up to date; b) materials have been modified according to ISO3585; c) separating funnels type2 (pear-shaped) have been modified; d) separating funnels type3 (Gilson type) have been cancelled. A bibliography lists additional ISO standards for other general-purpose laboratory glassware.

Introduction Separating funnels are used in laboratories for liquid/liquid extractions and they are intended to facilitate the separation into layers of two immiscible liquids of different density. Dropping funnels have a cylindrical body and are used for adding reagent solutions to a reaction vessel. They are, therefore, often provided with a ground cone at the bottom, for joining to vessels with conical ground necks. 1 Scope This International Standard specifies details of an internationally acceptable series of glass separating funnels and dropping funnels suitable for general use in laboratories. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 383, Laboratory glassware— Interchangeable conical ground joints. ISO 384, Laboratory glassware— Principles of design and construction of volumetric glassware. ISO 3585, Borosilicate glass3.3— Properties. ISO 4803, Laboratory glassware— Borosilicate glass tubing. ISO 4785, Laboratory glassware— Straight-bore glass stopcocks for general purposes. 3 Types and sizes Four types of funnels are specified, of the following sizes: type1: separating funnel (conical) (see7.1), nominal capacity (in millilitres) 50–100–250–500–1000 and2000; type2: separating funnel (pear-shaped) (see7.2), nominal capacity (in millilitres) 50–100–250–500–1000 and2000; type3: dropping funnel (cylindrical) (see7.3), nominal capacity (in millilitres) 50–100–250–500 and1000; type4: dropping funnel, graduated (cylindrical) (see7.4), nominal capacity (in millilitres) 50–100–250–500 and1000. If capacities are required other than those listed above, it is recommended that they should be in accordance with the requirements specified in this International Standard. 4 Materials 4.1 Separating funnels and dropping funnels shall be made from borosilicate glass3.3 in accordance with ISO3585. Internal stress and visible defects in the glass shall be reduced to a level sufficient to minimize the possibility of fracture due to thermal or mechanical shock. 4.2 Stopcock keys of separating funnels and dropping funnels shall be manufactured from borosilicate glass3.3 in accordance with ISO3585 or shall be manufactured from plastics material with suitable chemical and thermal characteristics, such as polytetrafluoroethylene. They shall be fitted with a suitable retaining device. 5 Construction 5.1 The construction shall be sufficiently robust to withstand normal usage. 5.2 Dropping funnels, supplied with a ground joint fitted below the stopcock, shall comply with the requirements of ISO383.

Dropping funnels with a ground joint below the stopcock can be provided with a pressure-equalizing tube placed at the back of the funnel when it is in the position of normal use with the handle of the stopcock on the right. Dropping funnels can be supplied with a Walter drop tip [see Figure 3 d)] to enable control of the drop speed. 5.3 The scale of graduated dropping funnels shall be placed centrally on the cylindrical part of the funnel when it is in the position of normal use with the handle of the stopcock on the right (for graduation and figuring, see ISO384). 5.3.1 The graduation marks shall be numbered (see7.4.1) — in ascending order, or — in both ascending and descending order (see7.4.3). 5.3.2 Scales shall be provided with a longitudinal reference line through the midpoint of the graduation lines to facilitate reading when the funnel is in an inclined position. NOTEThe scales of graduated dropping funnels only indicate approximately the volumes of liquid contained. 6 Marking The following shall be marked on all separating funnels and dropping funnels: — the nominal capacity, except for graduated dropping funnels; — the symbol cm3 or the symbolml; — the maker’s or vendor’s name or mark.

2 © BSI 03-2000 BSISO4800:1998

7 Dimensions 7.1 Type1— Separating funnels (conical type) Dimensions shall be as shown in Figure 1 and given in Table 1.

Figure 1 — Conical separating funnel

Table 1 — Dimensions of conical separating funnels Dimensions in millimetres Nominal capacity, ml 50 100 250 500 1000 2000

Height of body, h1 max. 120 145 190 230 300 350

Diameter of body, d1 max. 50 65 85 100 135 155 Wall thickness of body, s min. 1 1,2 1,5

a Diameter of stem , d2 min. 9 10 13

Length of stem, h2 max. 70 Nominal bore of stopcockb min. 1,5 2,5 4 Size of stopper (see ISO383) 14/23 or19/26 24/29 or29/32 29/32 Length of tube between bulb andstopcock max. 15 Wall thickness of tube between bulb and stopcock min. 1,2 1,5 2 a Medium-walled tubing in accordance with ISO4803. b Stopcocks in accordance with ISO4785, seriesI.

7.2 Type2— Separating funnels (pear-shaped type) Dimensions shall be as shown in Figure 2 and given in Table 2.

Figure 2 — Pear-shaped separating funnel

Table 2 — Dimensions of pear-shaped separating funnels Dimensions in millimetres Nominal capacity,ml 50 100 250 500 1000 2000

Height of body, h1 max. 95 120 160 200 250 295

Diameter of body, d1 max. 53 66 87 107 134 169 Wall thickness of body, s min. 0,8 0,9 1,3 1,5

a Diameter of stem , d2 min. 9 10 13

Length of stem, h2 max. 100 Nominal bore of stopcockb min. 1,5 2,5 4 Size of stopper (see ISO383) 14/23 or19/26 24/29 or29/32 29/32 a Medium-walled tubing in accordance with ISO4803. b Stopcocks in accordance with ISO4785, series I.

4 © BSI 03-2000 BSISO4800:1998

7.3 Type3— Dropping funnels Dimensions shall be as shown in Figure 3 and given in Table 3.

Figure 3 — Dropping funnels

Table 3 — Dimensions of dropping funnels Dimensions in millimetres Nominal capacity,ml 50 100 250 500 1000

Height of body, h1 min. 120 140 210 260 330

Diameter of body, d1 max. 34 44 54 67 88 Wall thickness of body, s min. 0,8 0,9 1,3

a Diameter of stem , d2 min. 10 13

Length of stem, h2 max. 100 Nominal bore of stopcockb min. 1,5 2,5 4 Size of stopper (see ISO383) 14/23 or19/26 24/29 or29/32 29/32 Length of tube between bulb andstopcock max. 15 Wall thickness of tube between bulb and stopcock min. 2 a Medium-walled tubing (see ISO4803). b Stopcocks in accordance with ISO4785, series I.

7.4 Type4— Graduated dropping funnels Dimensions shall be as shown in Figure 3 and given in Table 3. 7.4.1 Graduation See Table 4. Table 4 — Graduation of dropping funnels Values in millilitres Nominal capacity 50 100 250 500 1000 Subdivided in millilitres 1 or2 2 5 10 20 Numbered every millilitre 10 20 50 100 200 Lowest graduation line 5 or6 10 25 50 100

7.4.2 Total capacity based on average wall thickness See Table 5. Table 5 — Total capacity of dropping funnels Nominal capacity, ml 50 100 250 500 1000 Total capacity, ml 60 118 288 562 1100 Percentage above nominal 20 18 15 13 10

7.4.3 Scales See Figure 4.

Figure 4 — Scales for graduated dropping funnels

Bibliography

[1] ISO383, Laboratory glassware— Interchangeable conical ground joints. [2] ISO384, Laboratory glassware— Principles of design and construction of volumetric glassware. [3] ISO641, Laboratory glassware— Interchangeable spherical ground joints. [4] ISO1773, Laboratory glassware— Narrow-necked boiling flasks. [5] ISO3819, Laboratory glassware— Beakers. [6] ISO4142, Laboratory glassware— Test tubes and culture tubes. [7] ISO4785, Laboratory glassware— Straight-bore glass stopcocks for general purposes. [8] ISO4796, Laboratory glassware— Bottles. [9] ISO4797, Laboratory glassware— Flasks with conical ground joints. [10] ISO4798, Laboratory glassware— Filter funnels. [11] ISO4799, Laboratory glassware— Condensers. [12] ISO4800, Laboratory glassware— Separating funnels and dropping funnels. [13] ISO4803, Laboratory glassware— Borosilicate glass tubing. [14] ISO6556, Laboratory glassware— Filter flasks.

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