ﺍﻝﻌﺭﺒﻴﺔ ﺍﻝﺘﻘﻴﻴﺱ ﻝﺩﻭل ﻤﺠﻠﺱ ﺍﻝﺘﻌﺎﻭﻥ ﻝﺩﻭل ﺍﻝﺨﻠﻴﺞ ﻫﻴ

‫ﻫﻴﺌﺔ ﺍﻝﺘﻘﻴﻴﺱ ﻝﺩﻭل ﻤﺠﻠﺱ ﺍﻝﺘﻌﺎﻭﻥ ﻝﺩﻭل ﺍﻝﺨﻠﻴﺞ ﺍﻝﻌﺭﺒﻴﺔ‬
GCC STANDARDIZATION ORGANIZATION (GSO)
GSO ISO 7837:2009 (E)
ISO 7837:1992
‫ ﺘﻘﺩﻴﺭ ﺤﺠﻡ ﺍﻝﻜﺜﺎﻓﺔ )ﺍﻝﺤﺭﺓ( ﻝﺤﺒﻴﺒﺎﺕ ﺍﻷﺴﻤﺩﺓ‬-‫ﺍﻷﺴﻤﺩﺓ‬
Fertilizers - Determination of bulk density (loose)
of fine-grained fertilizers
ICS : 65.080
Fertilizers - Determination of bulk density (loose)
of fine-grained fertilizers
Date of GSO Technical Council : 28-29/10/1430 h(17-18/10/2009)
: Standard
Issuing Status
GSO STANDARD
GSO ISO 7837:2009
‫ﺘﻘـﺩﻴـﻡ‬
‫ﻫﻴﺌﺔ ﺍﻝﺘﻘﻴﻴﺱ ﻝﺩﻭل ﻤﺠﻠﺱ ﺍﻝﺘﻌﺎﻭﻥ ﻝﺩﻭل ﺍﻝﺨﻠﻴﺞ ﺍﻝﻌﺭﺒﻴﺔ ﻫﻴﺌﺔ ﺇﻗﻠﻴﻤﻴﺔ ﺘﻀﻡ ﻓـﻲ ﻋـﻀﻭﻴﺘﻬﺎ ﺍﻷﺠﻬـﺯﺓ‬
‫ ﻭﻤﻥ ﻤﻬﺎﻡ ﺍﻝﻬﻴﺌﺔ ﺇﻋﺩﺍﺩ ﺍﻝﻤﻭﺍﺼﻔﺎﺕ ﺍﻝﻘﻴﺎﺴـﻴﺔ‬، ‫ﺍﻝﻭﻁﻨﻴﺔ ﻝﻠﻤﻭﺍﺼﻔﺎﺕ ﻭﺍﻝﻤﻘﺎﻴﻴﺱ ﻓﻲ ﺩﻭل ﺍﻝﺨﻠﻴﺞ ﺍﻝﻌﺭﺒﻴﺔ‬
. ‫ﻭﺍﻝﻠﻭﺍﺌﺢ ﺍﻝﻔﻨﻴﺔ ﺍﻝﺨﻠﻴﺠﻴﺔ ﺒﻭﺍﺴﻁﺔ ﻝﺠﺎﻥ ﻓﻨﻴﺔ ﻤﺘﺨﺼﺼﺔ‬
‫ﻭﻗﺩ ﻗﺎﻤﺕ ﻫﻴﺌﺔ ﺍﻝﺘﻘﻴﻴﺱ ﻝﺩﻭل ﻤﺠﻠﺱ ﺍﻝﺘﻌﺎﻭﻥ ﻝﺩﻭل ﺍﻝﺨﻠﻴﺞ ﺍﻝﻌﺭﺒﻴﺔ ﻀﻤﻥ ﺒﺭﻨﺎﻤﺞ ﻋﻤل ﺍﻝﻠﺠﻨـﺔ ﺍﻝﻔﻨﻴـﺔ‬
‫ ( " ﻗﻁﺎﻉ ﻤﻭﺍﺼﻔﺎﺕ ﺍﻝﻤﻨﺘﺠﺎﺕ ﺍﻝﻜﻴﻤﺎﺌﻴﺔ ﻭﺍﻝﻐﺯل ﻭﺍﻝﻨﺴﻴﺞ " ﺒﺘﺒﻨﻲ ﺍﻝﻤﻭﺍﺼﻔﺔ ﺍﻝﻘﻴﺎﺴﻴﺔ ﺍﻝﺩﻭﻝﻴـﺔ‬1 ) ‫ﺭﻗـﻡ‬
‫ ﺘﻘﺩﻴﺭ ﺤﺠﻡ ﺍﻝﻜﺜﺎﻓﺔ )ﺍﻝﺤﺭﺓ( ﻝﺤﺒﻴﺒﺎﺕ ﺍﻷﺴﻤﺩﺓ" ﻭﺍﻝﺘﻲ ﺃﺼـﺩﺭﺘﻬﺎ‬- ‫ "ﺍﻷﺴﻤﺩﺓ‬ISO 7837:1992 ‫ﺭﻗـﻡ‬
‫ ﻭﻗﺎﻤﺕ ﺍﻹﻤﺎﺭﺍﺕ ﺍﻝﻌﺭﺒﻴﺔ ﺍﻝﻤﺘﺤﺩﺓ ﺒﺈﻋﺩﺍﺩ ﻤﺸﺭﻭﻉ ﻫﺫﻩ‬، ‫"ﺍﻝﻤﻨﻅﻤﺔ ﺍﻝﺩﻭﻝﻴﺔ ﻝﻠﺘﻘﻴﻴﺱ" ﻭﺫﻝﻙ ﺒﻠﻐﺘﻬﺎ ﺍﻷﺼﻠﻴﺔ‬
. ‫ﺍﻝﻤﻭﺍﺼﻔﺔ‬
‫ﻭﻗﺩ ﺍﻋﺘﻤﺩﺕ ﻫﺫﻩ ﺍﻝﻤﻭﺍﺼﻔﺔ ﻜﻤﻭﺍﺼﻔﺔ ﻗﻴﺎﺴﻴﺔ ﺨﻠﻴﺠﻴﺔ ﺩﻭﻥ ﺇﺩﺨﺎل ﺃﻴﺔ ﺘﻌﺩﻴﻼﺕ ﻓﻨﻴﺔ ﻋﻠﻴﻬﺎ ﻭﺫﻝـﻙ ﻓـﻲ‬
. (2009/10/18-17) ‫هـ‬1430/10/29-28 ‫ ﺍﻝﺫﻱ ﻋﻘﺩ ﺒﺘﺎﺭﻴﺦ‬، (18) ‫ﺍﺠﺘﻤﺎﻉ ﺍﻝﻤﺠﻠﺱ ﺍﻝﻔﻨﻲ ﺭﻗﻡ‬
Foreword
GCC Standardization Organization (GSO) is a regional Organization which
consists of the National Standards Bodies of GCC member States. One of GSO
main functions is to issue Gulf Standards /Technical regulations through
specialized technical committees (TCs).
GSO through the technical program of committee TC No.(1) "Chemical and
Textiles Products Sector TC" has adopted the International Standard No. ISO
7837:1992 "Fertilizers - Determination of bulk density (loose) of fine-grained
fertilizers" issued by (International Organization for Standardization) in its
original language. The Draft Standard has been prepared by United Arab
Emirates .
This standard has been approved as a Gulf Standard without any technical
modifications by GSO Technical Council in its meeting No. (18) , held on
28-29/10/1430h (17-18/10/2009) .
1
INTERNATIONAL
STANDARD
Second edition
1992-07-0 1
FerMizers - Determination
of bulk density
(loose) of fine-grained fertilizers
Engrais
engrais
- D6termination
fins
de la masse
vohiique
tassement
Reference number
ISO 7837: 1992(E)
ISO 7837:1992(E)
Fareward
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. Esch 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.
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 least 75 % of the member
bodies casting a vote.
International Standard
ISO/TC 134, Fertilizers
Physical
ISO 7837 was prepared
and
seil
conditioners,
by Technical Committee
Sub-Committee
SC 3,
properties.
This second
edition cancels
and replaces
the
(ISO 7837:1983), which has been technically revised.
0 ISO 1992
All rights reserved. NO part of this publication may be reproduced
or by any means, electronie or mechanical, including photocopying
permission in writing from the publisher.
International Organization for Standardization
Gase Postale 56 + CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
first
edition
or utilized in any form
and microfilm, without
ISO 7837:1992(E)
lntroductian
A method for the determination of the bulk density (loose) of solid fertilizers having particle sizes within the frequently encountered range from
about 0,5 mm to 5 mm is specified in ISO 3944:1992, Fertilizers
- Determination
of bulk density (Moose). This method is not, however, suitable
for fine-grained fertilizers having a large proportion of particles of diameters less than 0,5 mm. Such fertilizers pass with difficulty, in most
cases, from the specified funnel into the measuring cylinder, generally
Cause considerable
dust nuisance, and are inclined to form hollow
spaces (air cavities) within their bulk volume. The bulk density values
obtained are, thus, too low.
In the case of fine-grained fertilizers,
dust-tight, non-clogging
apparatus,
cylinder.
therefore, it is necessary to use a
with a relatively wide measuring
...
Ill
INTERNATIONAL
Fertilizers
fine-grained
1
STANDARD
-
ISO 7837:1992(E)
Determination
fertilizers,
of bulk density
Scope
3
This International Standard specifies a method for
the determination of the bulk density ( oose) of solid
fine-grained fertilizers.
The method is applicable to fertilizers Nhich contain
a large proportion of particles of diameters less than
0,5 117113.
For fertilizers which contain a large proportion
NOTE 1
of particles of diameters within the range from 0,5 mm to
5 mm, a method is specified in ISO 3944.
The method is applicabie to dry fertilizers only. If the
fertilizer has absorbed moisture during transport or
storage, it is necessaty to dry it in an environmental
chamber, with constant low humidity, Prior to the
determination.
Definition
references
Solid
fertilizers
-
Reduction
of sam-
ples.
ISO 8358:1991, Solid
samples for chemical
the
The bulk density (IooseJ is expressed
cubic centimetre (g/cm ).
4
in grams per
Principle
Pouring of the fertilizer from a specified filling device
into a specified measuring cylinder of known volume
and weighing of the contents of the cylinder.
Apparatus
capable
of weighing
to the nearest
5.2 Apparatus for determination
of bulk density
(loose), having the approximate dimensions given in
figure 1 and consisting of the following.
The following Standards contain provisions which,
through reference in this text, constitute provisions
of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision,
and Parties to
agreements
based on this International
Standard
are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 7742:1988,
Standard,
3.1 bulk density (loose) of a fertilizer:
The mass per
volume of a material after it has been tipped freely
into a Container under specified conditions.
5.1 Balance,
1 Cl*
Normative
of
For the purposes of this International
following definition applies.
5
2
(loose)
ferfilizers
and physical
-
Reparation
analysis.
5.2.1
Filling device (4) with spring-suspended
lockm
lever (5), for holding or loosening the hinged
cover. The hinged cover is opened by manipulating
the lever so that the contents of the filling device
discharge into the measuring cylinder.
ing
CAUTION - lt is important that those Parts of the
apparatus which are in contact with the fertilizer are
made of corrosion-resistant
material (glass, plastics,
etc.).
cylinder
5.2.2 Measuring
1 000 cm3 +
5
cm3.
-
(1) 3
of
capacity
of
5.2.3
lntermediate
piece (2) with hinged cover (3).
1
l
ISO 7837:1992(E)
5.3
Spatula,
other suitable
6
approximateiy
scraper.
Preparation
200 mm x 20 mm,
or
P=T
of test Sample
Prepare the test Sample by the methods given in
ISO 7742 and ISO 8358, ensuring that the Sample is
sufficient to carry out two separate determinations.
7
m
m
is the mass, in grams, of the test Portion;
V
is the volume up to the brim, in cubic
centimetres, of the measuring cylinder.
Take as the resuit the arithmetic mean of the two
determinations
provided that the requirement
for
repeatability (see 8.2) is satisfied.
Procedure
Pour the fertiiizer into the filiing device (5.2.1) up to
the brim. Open the hinged cover by manipuiating the
iocking lever.
After 2 min, remove the empty fiiiing device and the
intermediate piece (5.2.3) from the measuring cylinder (5.2.2). Scrape away the Surplus fertilizer from
the measuring cylinder using the spatula or other
suitabie tool (5.3).
Weigh the contents of the measuring
nearest 1 g.
cyiinder to the
8.2
Repeatability
The differente between the results of two determinations, carried out in rapid succession by the Same
Operator using the Same apparatus, shall not exceed
0,02 g/cm3.
9
Test report
i
The test report shaii inciude
lars:
the following
Carry out two determinations,
in rapid succession,
on separate test portions taken from the Same test
Sample.
a) identification
8
c) the resuit and the method of expression;
Expression
of results
b) reference
particu-
of the Sample;
to the method used;
d) any un usuai features noted during the determi8.1
Method
of calculation
The buik density (loose), ~3,of the fertiiizer, in grams
per cubic centimetre, is given by the equation
2
nation;
e) any Operation not included in this International
Standard or regarded as optional.
t
i
l
ISO 7837:1992(E)
b) Open posltlon
a) Closed posftlon
1 Measurlng cyllnder
lnternal dIameter
Internal helght
dl- 87mm*lmm
hi correspondlng to a capaclty
of 1000 cm3 * 5 cm3
2 Intermedla te plece
Internat dlameter
helght
dz= 87mm*lmm
=l35mm*lmm
.h2
3 Hlnged cover
4 Ftlling devtce
Lower lnternal dlameter
upper Internal dlameter
helght
5 Sprlng-suspended
Figure 1 - Apparatus
d3= 79 mm * ‘l mm
dr= 99mm*lmm
h,=l99mm*lmm
locklng lever
for determination
of bulk density (loose) of fine-grained
ferMizers
3
ISO 7837:1992(E)
--------------
UDC 631.8:531.755.22
Descriptors:
fertilizers,
Price based on 3 pages
fines,
tests,
determination,
bulk density,
density measurement.

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