1776 (TSO International Standard INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPrAHW3AUWA HO CTAHAAPTW3AUWW·ORGANISATION INTE RNATIONALE DE NORMALISATION ANsi Inttrnct Dor Sect Glass --- Resistance to attack by hydrochloric acid at 100 oC - Flame emission or flame atomic absorption spectrometric method Verre -- Resistance a I'attaque par I'acide chlorhydrique a 1oo oc -- Methode de détermination par spectrométrie d'absorption atomiquedeflammeoud'émissiondeflamme First edition -- 1985-10-15 Ref. No. 1SO 1776-1985 (E) UDC 666.1 : 620.193.41 : 543.42 Descriptors: glass, tests, boiling temperature tests, acid resistance tests, hydrochloric acid, spectrophotometric analysis. Price based on 5 pages Copyright International Organization for Standardization nitted without license from IHS Not for Resale 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, govern- mental and non-governmental, in liaison with IsO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by least 75 % approval by the member bodies voting. International Standard 1SO 1776 was prepared by Technical Committee ISO/TC 48, Laboratoryglassware and relatedapparatus. It cancels and replaces iS0 Recommendation R 1776-1970, of which it constitutes a technical revision. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1985 Printed in Switzerland Copyright International Organization for Standardization Isefrom IHS Not for Resale INTERNATIONAL STANDARD ISO 1776-1985 (E) Glass - Resistance to attack by hydrochloric acid at 100 oC -- Flame emission or flame atomic absorption spectrometric method Scope ISo 835/2, Laboratory glassware 1 Graduated pipettes Part 2: Pipettes for which no waiting time is specified. This International Standard specifies flame emission spec- trometric (FES) and flame atomic absorption spectrometric Iso 1042, Laboratory glassware - One-mark volumetric flasks. (FAAS) methods for determining the amounts of alkali metat ISO 1773, Laboratory glassware -- Boiling flasks (narrow- oxides released from the surfaces of glassware when subjected necked). to attack by an aqueous solution of hydrochloric acid at 100 oc. The amount of alkali metal oxides determined is a Iso 3585, Glass plant, pipeline and fittings -- Properties of measure of the acid resistance of the glass. borosilicate glass 3.3. Iso 3696, Water for laboratory use - Specifications. 1) Field of application 2 Iso 3819, Laboratory glassware -- Beakers.1) This International Standard applies to pieces of glass, prefer ably flat but, if necessary, curved, cut from articles of laboratory iso 6955, Analytical spectroscopic methods -- Flame emission, glassware,from components of glass plant, pipeline or fittings atomic absorption, and atomic fluorescence - Vocabulary. described as "chemical". 4 Principle The acid resistance of glass "as delivered'", i.e. the acid resis- tance of the original fire-polished surfaces, may be determined The method is a test for glass "as delivered" or for glass "as a material'!. exceed 10 % of the total surface area of the sample. hydrochloric acid solution, c(HCl) = 6 mol/l, at 100 °C for 3 h. mined when the original surface has been removed by the Determination of the amount of alkali metal oxides extracted hydrofluoric acid treatment described in 7.3.