Tiêu chuẩn iso 02190 2016

INTERNATIONAL
STANDARD

ISO
2190
Fourth edition
2016-10-01

Granulated cork — Determination of
moisture content
Granulés de liège — Détermination de l’humidité

Reference number
ISO 2190:2016(E)
© ISO 2016


ISO 2190:2016(E)

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ISO 2190:2016(E)

Page

Contents

Foreword ........................................................................................................................................................................................................................................ iv
1
2

3
4
5
6

Scope ................................................................................................................................................................................................................................. 1
Normative references ...................................................................................................................................................................................... 1

Terms and definitions ..................................................................................................................................................................................... 1

Principle ........................................................................................................................................................................................................................ 1
Apparatus ..................................................................................................................................................................................................................... 1
Sampling........................................................................................................................................................................................................................ 2

7

Procedure ..................................................................................................................................................................................................................... 2

8

Results ............................................................................................................................................................................................................................. 2

9

Test report................................................................................................................................................................................................................... 3

7.1
7.2

Test sample................................................................................................................................................................................................. 2
Determination ......................................................................................................................................................................................... 2

8.1
8.2

Calculation .................................................................................................................................................................................................. 2
Expression of results .......................................................................................................................................................................... 2

Bibliography ................................................................................................................................................................................................................................ 4

© ISO 2016 – All rights reserved

iii


ISO 2190:2016(E)

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work o f 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 o f
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
di fferent types o f ISO documents should be noted. This document was dra fted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f
patent rights. ISO shall not be held responsible for identi fying any or all such patent rights. Details o f
any patent rights identified during the development o f the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is in formation given for the convenience o f users and does not

constitute an endorsement.

For an explanation on the meaning o f ISO specific terms and expressions related to con formity assessment,

as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html .
The committee responsible for this document is ISO/TC 87, Cork.
This fourth edition cancels and replaces the third edition (ISO 2190:1998), of which it constitutes a
minor revision. Minor editorial details have been introduced in this edition (see French title and
Clause 3 and 5.3).

iv

© ISO 2016 – All rights reserved


INTERNATIONAL STANDARD

ISO 2190:2016(E)

Granulated cork — Determination of moisture content
1 Scope
This

do c u ment

granulated cork.
NO TE

s p e c i fie s

the

re ference

me tho d

fo r

de te r m i n atio n

of

the

mo i s tu re

co nte nt

of

Fo r the p u r p o s e s o f fac tor y control , the m a nu fac tu rer c a n cho o s e a no ther te s t me tho d a nd/o r d i fferent

equipment. In this case, it is important to establish the co-relation between that method (current method) and
the reference method.

2 Normative references
T he

fol lowi ng

do c u ments are re ferre d to i n the tex t i n s uch a way th at s ome or a l l o f thei r content

con s titute s re qu i rements o f th i s do c u ment. For date d re ference s , on ly the e d ition cite d app l ie s . For
u ndate d re ference s , the late s t e d ition o f the re ference d do c ument (i nclud i ng a ny amend ments) appl ie s .

ISO 2067, Granulated cork — Sampling
3 Terms and definitions
For the pu r p o s e s o f th i s do c u ment, the term s and defi nition s given i n I S O 6 3 3 and the

fol lowi ng

apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at />— IEC Electropedia: available at />3.1
moisture content

lo s s o f ma s s o f a te s t s p e ci men a fter d r yi ng under s p e c i fic cond ition s , comp are d to the i n iti a l ma s s o f

the test specimen
4 Principle

Weigh i ng , d r yi ng and reweigh i ng o f a te s t s p e c i men; the lo s s o f mas s c a lc u late d i s the moi s tu re content.

5 Apparatus
O rd i nar y l ab orator y e quipment and, i n p a r tic u l ar, the

fol lowi ng.

5.1 Balance, with a resolution of 0,01 g.
5.2

Oven, ventilated, and maintained at (103 ± 2) °C.

5.3

Open containers

(dry) , o f s uch dimens io ns that allo w the tes t s p ecimen to b e ab o ut 5 0 mm high.

To d r y the contai ners , put them i n the oven at 103 ° C

for 30 min.

© ISO 2016 – All rights reserved

for 3 0

m i n . T hen put the contai ners i n the de s icc ator

1


ISO 2190:2016(E)

5.4

Desiccators , o f adequate cap acity to ho ld the co ntainers , and co ntaining an e fficient des iccant (e. g.

silica gel).
6

Sampling

C arr y out the s a mpl i ng i n accordance with the pro ce du re s p e ci fie d i n I S O 2 0 67.

7
7.1

Procedure
Test sample

From the l ab orator y s ample (s e e I S O 2 0 67 ) , ta ke at random th re e te s t s p e c i men s o f ab out 5 0 g e ach .

7.2

Determination

Determine the mass of each container (5.3) to the nearest 0,1 g (m1).
Place e ach te s t s p e ci men i n a contai ner, d i s tributi ng it i n s uch a way that its s u r face i s hori z onta l and

the test specimen is about 50 mm high.
Determine the mass of each set (m 2 ), to the nearest 0,1 g. Put the sets in the oven (5.2) set at 103 °C, for
at least 1 h. Then place them in the desiccator and let them cool for at least 30 min. Then determine the
mass of each set.
Repeat the procedure described above until constant mass (i.e. until two consecutive weighings of each
ff
m 3 ).
s e t do no t d i

er b y more th an 0 , 5 g) (

To accelerate the te s t, it i s advi s able that the fi rs t d r yi ng b e

8
8.1

for

at le as t 3 h .

Results
Calculation

T he moi s tu re content o f e ach te s t s p e ci men re ferre d to i n the i n iti a l ma s s ( b e fore d r yi ng) a nd e xpre s s e d
as a p ercentage, rou nde d o ff to the ne are s t i nteger, i s given b y the

m2 − m3
m 2 − m1

formu l a:

× 100

where

m1
ff
f

m 2 is the mass, in grams, rounded off to the nearest 0,1 of the container and test specimen (set)
i s the mas s , i n gra m s , rou nde d o

to the ne are s t 0 ,1 o

the contai ner;

b e fore d r yi ng;

m 3 is the mass, in grams, rounded off to the nearest 0,1 of the container and test specimen (set)
a fter d r yi ng.

8.2

Expression of results

Take as the moisture content of the granulated cork the average, rounded off to the nearest integer, of
the results obtained for each test specimen.

2

© ISO 2016 – All rights reserved


ISO 2190:2016(E)

9

Test report

The test report shall include the following particulars:
a)

a l l de ta i l s re qui re d to identi fy the s a mp le;

b) the result obtained, in accordance with Clause 8

;

c)

re ference to th i s do c u ment;

d)

a l l op erati ng de tai l s no t s p e ci fie d i n th i s do c u ment, or regarde d a s op tiona l;

e)

de ta i l s o f a ny i ncidents wh ich may have i n fluence d the re s u lts .

© ISO 2016 – All rights reserved

3


ISO 2190:2016(E)

Bibliography

[1]

4

ISO 633, Cork — Vocabulary

© ISO 2016 – All rights reserved



ISO 2 1 90: 2 01 6(E)

ICS  79.1 00

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