SIST ISO 758:1995
(Main)Liquid chemical products for industrial use -- Determination of density at 20 degrees C
Liquid chemical products for industrial use -- Determination of density at 20 degrees C
The principle of the specified method of reference consists in the determination of the mass of a volume of the substance at 20 °C which is contained in a pyknometer, and the determination of the capacity of pyknometer by measuring the mass of an adequate volume of water at 20 °C. Calculation of the density by division of the mass of substance by the capacity of pyknometer. - Replaces ISO Recommendation R 758-1968.
Produits chimiques liquides à usage industriel -- Détermination de la masse volumique à 20 degrés C
Tekoči kemijski proizvodi za industrijsko uporabo - Določanje gostote pri 20 °C
General Information
- Status
- Published
- Publication Date
- 31-Jul-1995
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Aug-1995
- Due Date
- 01-Aug-1995
- Completion Date
- 01-Aug-1995
Overview
ISO 758:1976 specifies a reference method for determining the density of liquid chemical products for industrial use at 20 °C. The procedure uses a glass pyknometer (Gay-Lussac type) to measure the mass of a known volume of sample and of distilled water at 20 °C, and calculates density from the measured masses with the appropriate buoyancy correction. This International Standard replaces ISO Recommendation R 758‑1968.
Key topics and requirements
- Principle: Determine the mass of a fixed internal volume (pyknometer) when filled with the sample and, separately, with water at 20 °C to establish the flask capacity. Calculate density by dividing the sample mass by the pyknometer capacity, applying buoyancy correction.
- Apparatus:
- Pyknometer flask, type 3 (Gay‑Lussac) (ISO 3507); commonly 25 ml or 50 ml.
- Water bath capable of maintaining 20 ± 0.1 °C.
- Standard laboratory balance with readability to 0.001 g.
- Procedure essentials:
- Clean, dry and weigh the empty pyknometer (with stopper).
- Fill with freshly boiled, cooled distilled water, bring to 20 ±0.1 °C and determine apparent mass.
- Empty, dry, fill with the sample and determine apparent mass at 20 °C.
- Take precautions with volatile liquids to avoid evaporation losses.
- Calculations and reporting:
- Use the measured masses and the known density of water at 20 °C (given in the standard as 0.9982 g/ml) and apply a buoyancy correction for air.
- Report results to three decimal places (g/ml).
- Test report must identify the method used, results and expression method, and note any unusual observations or departures from the standard procedure.
Applications and users
ISO 758:1976 is a practical, repeatable reference method used for:
- Quality control and specification checks of industrial liquid chemicals.
- Routine laboratory density determinations for product blending, formulation and acceptance testing.
- Comparative measurements where a standardized reference method is required for contractual or regulatory purposes. Typical users include chemical manufacturers, QC laboratories, testing and calibration laboratories, and standards organizations.
Related standards
- ISO 3507 – Pyknometers (specifies pyknometer dimensions and types referenced by ISO 758).
- ISO 758 replaces ISO Recommendation R 758‑1968.
Keywords: ISO 758, density at 20°C, pyknometer, Gay‑Lussac, liquid chemical products, buoyancy correction, ISO 3507, laboratory procedure, industrial chemicals.
ISO 758:1976 - Liquid chemical products for industrial use -- Determination of density at 20 degrees C
ISO 758:1976 - Produits chimiques liquides a usage industriel -- Détermination de la masse volumique a 20 degrés C
ISO 758:1976 - Produits chimiques liquides a usage industriel -- Détermination de la masse volumique a 20 degrés C
Frequently Asked Questions
SIST ISO 758:1995 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Liquid chemical products for industrial use -- Determination of density at 20 degrees C". This standard covers: The principle of the specified method of reference consists in the determination of the mass of a volume of the substance at 20 °C which is contained in a pyknometer, and the determination of the capacity of pyknometer by measuring the mass of an adequate volume of water at 20 °C. Calculation of the density by division of the mass of substance by the capacity of pyknometer. - Replaces ISO Recommendation R 758-1968.
The principle of the specified method of reference consists in the determination of the mass of a volume of the substance at 20 °C which is contained in a pyknometer, and the determination of the capacity of pyknometer by measuring the mass of an adequate volume of water at 20 °C. Calculation of the density by division of the mass of substance by the capacity of pyknometer. - Replaces ISO Recommendation R 758-1968.
SIST ISO 758:1995 is classified under the following ICS (International Classification for Standards) categories: 71.040.40 - Chemical analysis. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase SIST ISO 758:1995 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-avgust-1995
7HNRþLNHPLMVNLSURL]YRGL]DLQGXVWULMVNRXSRUDER'RORþDQMHJRVWRWHSULƒ&
Liquid chemical products for industrial use -- Determination of density at 20 degrees C
Produits chimiques liquides à usage industriel -- Détermination de la masse volumique à
20 degrés C
Ta slovenski standard je istoveten z: ISO 758:1976
ICS:
71.040.40 Kemijska analiza Chemical analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
~~
INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXLIYHAPOfiHAJl OPTAHM3AUWl I-IO CTAHLIAPTM3AUMM l ORGANIZATION INTERNATIONALE DE NORMALISATION
-
Liquid chemical products for industrial use - Determination
of density at 20 “C
Prod&s chimiques liquides ;i usage industriel- De’termination de la masse volumique ;i 20 “C
First edition - 1976-11-15
UDC 531.756.1 : 542.3
Ref. No. IS0 758-1976 (E)
Descriptors : chemical compounds, liquids, physical tests, density (mass/volume), measurement, pyknometric analysis.
Price based on 2 pages
FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 member bodies). The work of developing
International Standards is carried out through IS0 technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
adopted technical committees are circu lated
Draft International Standards by the
their acceptance as lnternat ional
to the member bodies for approval before
Standards by the IS0 Council.
Prior to 1972, the results of the work of the technical committees were published
as IS0 Recommendations; these documents are in the process of being transformed
into International Standards. As part of this process, Technical Committee
lSO/TC 47, Chemistry, has reviewed IS0 Recommendation R 758-1968 and found
it technically suitable for transformation. International Standard IS0 758 therefore
replaces IS0 Recommendation R 758-1968, to which it is technically identical.
IS0 Recommendation R 758 has been approved by the member bodies of the
following countries :
Austra I ia Germany Poland
Austria Hungary Portugal
Belgium India Romania
Chile Israel Spain
Colombia Italy United Kingdom
Czechoslovakia ’ Japan U.S.S.R.
Egypt, Arab Rep. of Korea, Rep. of Yugoslavia
France Netherlands
The m
ember body of the following country had ex pressed disapproval of the
Recom mendation o n technical grounds
U.S.A.
The member body of the following country disapp roved the transformation
of th e Recommendation into an Inter
...
~~
INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXLIYHAPOfiHAJl OPTAHM3AUWl I-IO CTAHLIAPTM3AUMM l ORGANIZATION INTERNATIONALE DE NORMALISATION
-
Liquid chemical products for industrial use - Determination
of density at 20 “C
Prod&s chimiques liquides ;i usage industriel- De’termination de la masse volumique ;i 20 “C
First edition - 1976-11-15
UDC 531.756.1 : 542.3
Ref. No. IS0 758-1976 (E)
Descriptors : chemical compounds, liquids, physical tests, density (mass/volume), measurement, pyknometric analysis.
Price based on 2 pages
FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 member bodies). The work of developing
International Standards is carried out through IS0 technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
adopted technical committees are circu lated
Draft International Standards by the
their acceptance as lnternat ional
to the member bodies for approval before
Standards by the IS0 Council.
Prior to 1972, the results of the work of the technical committees were published
as IS0 Recommendations; these documents are in the process of being transformed
into International Standards. As part of this process, Technical Committee
lSO/TC 47, Chemistry, has reviewed IS0 Recommendation R 758-1968 and found
it technically suitable for transformation. International Standard IS0 758 therefore
replaces IS0 Recommendation R 758-1968, to which it is technically identical.
IS0 Recommendation R 758 has been approved by the member bodies of the
following countries :
Austra I ia Germany Poland
Austria Hungary Portugal
Belgium India Romania
Chile Israel Spain
Colombia Italy United Kingdom
Czechoslovakia ’ Japan U.S.S.R.
Egypt, Arab Rep. of Korea, Rep. of Yugoslavia
France Netherlands
The m
ember body of the following country had ex pressed disapproval of the
Recom mendation o n technical grounds
U.S.A.
The member body of the following country disapp roved the transformation
of th e Recommendation into an International Standard :
Netherlands
0 International Organization for Standardization, 1976 l
Printed in Switzerland
INTERNATIONAL STANDARD IS0 758-1976 (E)
Liquid chemical products for industrial use - Determination
of density at 20 “C
6.2 Empty, clean and dry the flask, fill it wi
...
NORME INTERNATIONALE~ 758
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION +lElK~YHAPOAHAJl OPrAHM3ALWI l-I0 CTAHAAPTM3AWiki *ORGANISATION INTERNATIONALE DE NORMALISATION
Produits chimiques liquides à usage industriel - Détermination
de la masse volumique à 20 “C
Determination of density at 20 “C
Liquid chemical products for industrial use -
Première édition - 1976-I 1-15
CDU 531.756.1 : 542.3 Réf. no : ISO 758-1976 (F)
Descripteurs : produit chimique, liquide, essai physique, masse volumique, mesurage, méthode pycnométrique.
Prix basé sur 2 pages
AVANT-PROPOS
L’ISO (Organisation internationale de normalisation) est une fedération mondiale
d’organismes nationaux de normalisation (comités membresde I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partiedu comité technique
correspondant.
Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont
soumis aux comités membres pour approbation, avant leur acceptation comme
Normes internationales par le Conseil de I’ISO.
Avant 1972, les résultats des travaux des comités techniques étaient publiés
comme recommandations ISO; ces documents sont en cours de transformation
en Normes internationales. Compte tenu de cette procédure, le comité technique
ISO/TC 47, Chimie, après examen, est d’avis que la Recommandation
ISO/R 758-1968 peut, du point de vue technique, être transformée. La présente
Norme internationale remplace donc la Recommandation ISO/R 7584968, à
laquelle elle est techniquement identique.
Les comités membres des pays suivants avaient approuvé la Recommandation
ISO/R 758.
Allemagne Égypte, Rép. arabe d’ Pologne
Portugal
Australie France
Roumanie
Autriche Hongrie
Royaume-Uni
Belgique Inde
Tchécoslovaquie
Chili Israël
U.R.S.S.
Colombie Italie
Yougoslavie
Corée, Rép. de Japon
Espagne Pays-Bas
Le comité membre du pays suivant l’avait désapprouvée pour des raisons
techniques :
U.S.A.
Le comité membre du pays suivant a désapprouvé la transformation de la
recommandation en Norme internationale :
Pays-Bas
0 Organisation internationale de normalisation, 1976 l
Imprimé en Suisse
ISO 758-1976 (F)
NORME INTERNATIONALE
Produits chimiques liquides à usage industriel - Détermination
de la masse volumique à 20 “C
6.2 Vider, laver et sécher la fiole, la remplir avec le produit
1 OBJET ET DOMAINE D’APPLICATION
en examen et déterminer, de la même manière, la masse
La présente Norme internationale
...
NORME INTERNATIONALE~ 758
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION +lElK~YHAPOAHAJl OPrAHM3ALWI l-I0 CTAHAAPTM3AWiki *ORGANISATION INTERNATIONALE DE NORMALISATION
Produits chimiques liquides à usage industriel - Détermination
de la masse volumique à 20 “C
Determination of density at 20 “C
Liquid chemical products for industrial use -
Première édition - 1976-I 1-15
CDU 531.756.1 : 542.3 Réf. no : ISO 758-1976 (F)
Descripteurs : produit chimique, liquide, essai physique, masse volumique, mesurage, méthode pycnométrique.
Prix basé sur 2 pages
AVANT-PROPOS
L’ISO (Organisation internationale de normalisation) est une fedération mondiale
d’organismes nationaux de normalisation (comités membresde I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partiedu comité technique
correspondant.
Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont
soumis aux comités membres pour approbation, avant leur acceptation comme
Normes internationales par le Conseil de I’ISO.
Avant 1972, les résultats des travaux des comités techniques étaient publiés
comme recommandations ISO; ces documents sont en cours de transformation
en Normes internationales. Compte tenu de cette procédure, le comité technique
ISO/TC 47, Chimie, après examen, est d’avis que la Recommandation
ISO/R 758-1968 peut, du point de vue technique, être transformée. La présente
Norme internationale remplace donc la Recommandation ISO/R 7584968, à
laquelle elle est techniquement identique.
Les comités membres des pays suivants avaient approuvé la Recommandation
ISO/R 758.
Allemagne Égypte, Rép. arabe d’ Pologne
Portugal
Australie France
Roumanie
Autriche Hongrie
Royaume-Uni
Belgique Inde
Tchécoslovaquie
Chili Israël
U.R.S.S.
Colombie Italie
Yougoslavie
Corée, Rép. de Japon
Espagne Pays-Bas
Le comité membre du pays suivant l’avait désapprouvée pour des raisons
techniques :
U.S.A.
Le comité membre du pays suivant a désapprouvé la transformation de la
recommandation en Norme internationale :
Pays-Bas
0 Organisation internationale de normalisation, 1976 l
Imprimé en Suisse
ISO 758-1976 (F)
NORME INTERNATIONALE
Produits chimiques liquides à usage industriel - Détermination
de la masse volumique à 20 “C
6.2 Vider, laver et sécher la fiole, la remplir avec le produit
1 OBJET ET DOMAINE D’APPLICATION
en examen et déterminer, de la même manière, la masse
La présente Norme internationale
...
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