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INTERNA丁 iONAL
:SO
123
STANDARD
Third ed1lon
2001-o5-15
Rubber latex
Latex de caoutchouc
-
-
Sampling
Echantittonnage
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Reference ntlmber
lS0 123:2001(E)
◎
IS0 2001
′Ｆ
IS0 123:2001(E)
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o iso 2001
All rights reserved Unless,otherwise specrfied, no part of this publicalion
may be reproduced or utilized in any i, n or by any means, electronic or mechanical, including photocopying and microfilm, without permission
in writing from ejlher lSo at the duuresS below or lSO,s member body in the counlry of the requester.
ISO copyright office
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IS0 2001-A‖ nghts reserved
iS0 123:2001(E)
ａ
Ｐ
１
Scope
２
Normative references
３
Terms and delinitions
４
Principle
Apparatus
Sampling
Labelling the laboratory sample and the test sample
Sampling report
￨
” １１１２２３７８
Contents
′
￨
rio
◎ IS0 2001-Al r ghis reserved
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冬
ISO電盆312001(E)
Foreword
iSO(the internaIOnal organization for Standardizalon)iS a wOndwide federalon of na経 ←■1,standards bodies(lSO
member bodies).The"ork of preparing lnterna」 onal Standards is nOrmally carried ottt ll■ ■蜃gh ISO teChnical cOm_
mhtees.Each member body interested in a subieCt fOr which a technicai committee h3■
right to be represented on that committee.lnternational organizations,9overnmental凛
sOn wnhlso,also tale partin the work.lSO collaborates cloSely wlh the lnternalonal霊
(IEC)on a‖ matters of electrotechnical standardization.
■,len established has the
■ ,‐ 90Vernmental,in liaト
11争 teChnical COmmission
:■ ■
F■
1(〉
International Standards are drafted in accoだ ance with the rし les given in the iSO/1EC Dire● tives,Part 3.
③曝ember bodies ibr voting.
Draft lnternational Standards adopted by the technical committees are circulated to tれ
Publication as an international Standard requires approval by atleast 75° /。 of the rnernも er bodies casting a vote.
Attention is drawn to the possibility that some of the elements Of this:nternational Standard may be the subiect of
patent面 ghts.:SO shall n6t be held reSponSible foridentifying any or all such patent‖ 9hts:
lnternalonal Standard IS0 123 was prepared by Technical Commtttee lSo/TC 45,R″
Sθ わ油θrubberわ dυsrry.
Subcommittee SC 3,Paw marerials rincruding lale,for υ
bわ er
and″ わわer ρЮdtFCrs,
This third edition canceis and replaces the second edition(iS0 123:1985),whiCh has♭ 吟中R technica‖ y revised.The
principal differences lle in more precise definitions and specifications forthe frequency tl sampling.in addition,the
method of homogenizing and samp‖ ng latex in drums fittё d with bungs has been modifi3も :む take account of practical
considerations.
: F
::桑 .■ 1
◎
ISC)2001-A‖
rigl,ts rese,ved
:S012312001(E)
iNTERNAT:ONAL STANDARD
Rubber latex
-
Sampling
■
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WARNING… …Persons using this:nternational Standard should be familiar with normal laboratory practice.
This standard does not purportto address a‖ of the safety problems,if any associated with its use.itis the
responsibi:ity ofthe userto establish appropriate safety and health practices and to ensure compliance with
any nationa:regulatory conditions.
This lnternational Standard specifies procedures for sampling natural rubber latex concentrate and for sampling synthetic rubber latices and artificial latices. lt is also suitable for sampling rubber latex contained in drums, tank cars or
tanks. The procedures may also be used for sampling plastics dispersions.
2
Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this lnternational Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this lnternational 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 ciocument referred to applies. Members of ISO and IEC maintain registers of currently valid lnternational Standards.
ISO 124:1997 , Latex, rubber
IS0 706:1985,Pυ
bわ er
-
Determination of total solids content.
larex― Derermわ ar′ ορο′εοagυ rtrm θοttrettr作訂θye κSttυ O九
g――Parrブ f
rθ ttθ ttrS ar7d reS″ 月
IS0 3310‐ 1:2000,7bsi s′θyes― ―乃 cわ /7iCa′ re9υ ′
ISO 15528:2OOO, Paints, varnishes and raw materials for paints and varnishes
3
ttsr s′ θyes
-
οF merar wic c′ Orわ
.
Sampling.
Terms and definitions
For the purposes of this lnternational Standard, the following terms and definitions apply.
3.1
lot
a definite quantity of latex processed or produced under conditions which are presumed uniform
NOTE A lot may be
in one or more containers or vessels. For example, it may consist oi several drums of latex.
3.2
sample
a quantity oflatex that has been drav.ln from a lot
つ
0
laboratory sample
a quantity oflatex intended forlaboratory inspect on
and testing and that is representative of the lot
,ダ・
O ISO 2001
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-
All riEhts Teserved
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´
iS0 123:2001(E)
3.4
test sample
a quantity of latex suitable for testing, obtained by straining the
laboratory sampp,
NOTE The laboratory sample,
not the test sample, is used for the determination of coagutum
content
(.
+ 6.5.s).
3.5
test porticn
a quantity of latex taken from the test sampie.(3.4) oi' laboratory
sample (3.3), for tlie purpose ,-i a single specific test,
for example the amount actually weighed out from the test sampte
for a single determination cl iotal solids content
3.6
coagulum contenUsieve residue
coarse foreign matter and flocculated rubber retained under the conditions
of the Lest
age aperture width of 'tB0 pm * 10 pm complying with ISO 3310_1
(lso
706) on a filter with aver-
NorE ln the context of examination of latex shipments, bulk deliveries, etc., this is what is gener.ally
understood by ,,coagulum,,.
Pieces of latex skin and coagulated rubber should not be included
in the laboratory sample.
4 Principle
念
￡∬
騎電
器よ
b° rat° ry
5
mmデ
:.垣
of the latex. The test sample is prepared by straining the
壺中■半
子
:些
Apparatus
5.1
Stirrer, for homogenization of latex in drums.
For open-headed drums, use either 5.1.1 or 5.1.2. For drums
fitted with a bung, see 6.4.1.4.
5'1'1 Plunger, consisting
of a perforated, chrome-plated or stainless-steel disc of diameter approximately
150 mm,
with smooth-edged holes of diameter approximately 10 mm.
5'1'2 Motor-driven stirrer, capable
︰︰
of operating at a speed of 5 radls to 21 radls (50 r/min to 200 r/min).
董
鑢
“
︲
⋮
A suitable type of motor-driven stirrerconsists of a stainless-steelpropellerof
110 mm minimum diameter, mounted
on a stainless-steel shaft sufficiently long for the propeller
to be ai a distance of about one-tenth the depth of the latex
from the bottom of the drum.
︰
︰
１
︰
vortex.
︲
lf desired, two propellers may be used on the same shaft, in
which case the lower one shall meet the foregoing requirements as regards position. The rotational frequency
inurr ui such as to give a brisk turnover without cierting ,
⋮
of rotating a drum at
:il∬:::蹂蟹￨::L温ま♀J製 ∬ F鳳 :箔罰iよれ」はま
approximately
l
rad/s
represenね Ive sam● e ttOm a knOwn
5.2.l Sampling tubes fOrlatex in drurns
Use either5 2 1 l or5 2 1 2
千
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⋮
:こ hTIピ 1翼メ霞
(optional, see 6.4.1.s), capable
⋮
(10 r/min).
⋮
5'1'3 Motor-driven drum roller
iS0 123:2001(E)
NOTE lnsertirrg
piovides a ci'oss-section of the latex at all depths as a sample'
a tube open at both ends into rhe latex eifeciiveiy
approximately 25 rnm and length at least 1 m' the bot5.2.1.2 Sampling tube, stainless stee!, o{ internal drameter
of a suitable cie','ice is grven in Figure 1'
A ilrawing
tom of which can be opened or closed by rernote conirci.
5.2.2 Sampling deviees for latex in tank cars on tanks
5.2.2.1 or 5'2'2'2 ii the depth is less than 3 m'
Use 5.2.2.1 if the depth o{ the iatex is 3 m or rT]oi"e. Use either
1 dm3, closed by a lid or bung that can be
5.2.2.1 Cylindrical sta!nless-steel vessel, of capacity approximately
Lounled ior iniertion io the :"equired depth' A device similar
opened by remote control. such a vessel ,uy o" rigidly
given in lSo 15528'
is suitable. A variety of otf,er suitable devices for samoling are
to that shown in Figure 2
to 5.2 1'2 but length 3 m' the bottom
s.2.2.2 Sampling tube, stainless steel, of internal dianreter 25 mm, similar
of
機・
・
which can be opened or closed by remote control'
tube or vessel. The beakers shall be shockBeakers, of capacity 2 dm3, to receive the iatex {ronr the sampling
to
iatex'
inei't
resistant and have a smooth inner surface that is chemically
5.3
shall havf a smooth inner surface and be
Sampie botiles, of capacity I dm3, with screw caps. The bottles
and some types o{ plastic are suitable materials' Thin
made of materiai that is chemically resistant to latex. Glass
flexible containers shall not be used'
5.4
NOTE For purposes
o{
trans-shipment. narrow-necked containers with a deep thread are r-'r*ferable'
stainless-steel wire or synthetic cloth inert
10 pm, compiying with ISO 3310-1 '
5.5 Filter, of
180 pm
︱薔︲
6
:t
to latex, with
:rin average aperture width of
Sampling
疹,l
At a‖
Genera]
stages of sampling,avoid introducing air intO the latex and keep expOSure of llte latex tO airto a minirnum.
6.2 「 requency of Sampling
6.2.l
6.盆 .盆
ise
l」 nless othenハノ
fiedin 6 2 2 and 6.2.3
agreed,sampling sha‖ be Carried out atthe frequency sFI■
匡very lot Shall be sampled
器
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『 iFt:iL諄 :脚 Ifr点話
:fⅧ
brr:緊
鳳T惚 lRF龍 ).ま悧ば棚懸1ず驚棚
twelve,seven from siXty‐ 10uF,etC)
yithd「 a、ヘ
ノ
n at
hich the samples are to beヽへ
Selectthe containers iromぃノ
randorll th「
ol.1lhOutthe cOnsignment.
5寧 prelittlinarv exanl:nat:◎ 隅
η 119,9rOSS COag_llur■
Exanline the lateX ViSua‖ y,and record the presence of Crealη
.
:,l alnlJ fo′ 毒ign
matter
3
O ISO 200'1
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iS0 12312001(E)
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Handle
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Key
1
i-jandle (manuai +ornpi-essioi-i opens iid)
2
Fods
3
Lid
4
Container r:i appropriaie size
a Suitable length for"taking sample
r..;Or
rsirucirolI i nater tat. siatnlesai steel
F:sure 2ヽ ―ヽ頸x晏 :魂貯ie ⑬f 8:atex― sattp:i『 19 dev:こ舎
ag
ISO 200
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lS① 123:2001(E)
6"4 Sampling from drums
6.4.竜
Homogenizatio恥
6.4.1.l Homogenize the latex manua‖ y as specified in 6 4 1 2 o「
ate,by means of a drum ro‖ er as specifled in 6 4 1 5.
mechanica‖ y as specified in‐
1 1 3or,if appropri―
6.4.1.2 1fthe drum is ofthe open― head type,remove the end head ancl agitate the contents lir ilileast 5 miil,pref―
erably by tteans of a perforated stainless―
steel plunger(5 1 1)
6.4.1.3 Alternatively,agitate the contents ofthe drum by means olthe rnotor‐ driven stirrer(11 2)ior」 O minto ho―
nnoQenize the latex Avoid excessive stirring.
6.4,1.4 1fthe drum is ofthe closed― head typre fitted with a bung and contains!ess than 2° 。ai「 space,then manual
its side and「 ollit to and i「 oと
・ 111ly lor ilot iess than
or rnechanical homogenizatioln is impractical.Lay the drum ol―
‐
■
r to stand for about
1■
erly
uppermost
and
al
1 0 rnin Turn the drum so thatitis standing on the end vyhich ttva3 10「
1 5 rrliPI,then「 epeat the folling operation for a furthe「 1 0 mlrl
6.4.1.5 Alternatively,lf a single drum is tO be sampled“
on_―t drurn「 o‖ erfor 24 h at abouttt rad/s(10″ min)
is permissible to homogenize the la,`tx by「
o‖
ing the drtlm
6.4.2 Taking the laboratory salrnple(see 3・ 3)
6.4.2.1 General
After the latex has been homogenized (see 6.4.1), take the sample without deiay as specifierd in 6.4.2.2 or 6.4.2.3,
using a clean, dry sampling tube (5.2.1). Take care to avoid the inclusion of any gross coagulurn or skin with the
sample.
6.4.2.2 Sampiing from a singie ttru圃
lnsertthe sampllng tube(521),open at both ends,slowly into the Crum untilit reaches the l●
itonl Then close the
「iterts tl_ら ιl,an,OFv 3な「千 le boitle 15 4)Re―
=●
'口
ple bottle,leaving an a r space of 2,8to 5,6
peat the operation until sufficientiatex has been obialned io lillthe sal■
ofthe volume(to al10VV forthermal expanslon),and screvvthe cap fけ「Fly Onio the bottie
upper end oft卜 le tube wllln the stopper,withdraw it and i「
3■ sier tlモ
NOttE liis irrpOrtantthatthe saih口 e bottle is almost f_lli and a rt ght
6.4.2.3 Sarnpling fronl several drums
Where sampling ofthe same lot oflatex from several drums is to be carried out,for example in 10%sampling(see
iex wnhdrawn i「 olla each drum may
623),and it has been agreed thatthe samples may be blended,the amount ofl島
be reduced proportionately ln this case,the indivldual sanlples sha i be combinet i「 i a beaker(53)and stirred briefly
to ensure uniformlty and the resultantlaboratory samples boltled(multiple sample3 may be required,for example for
arbitration)
6.5 Sampl:ns fr◎
6.5.¶
齢
tank cars attd tanks
Soneral
Sarooles are in tia‖ v taken f「 onl 1lfferer:t depth3 1●
号 F311「
NOttE For fixed tanks, estab ishing su table conditions
homogeneity each tirne a salη ple is taken
軋
F‐
thュ￨￨IF
lal,IIュ 11,"o●
、
″hich resu t in homogenelty
手 :Ⅲ e● [:s
￨ハ ll lnake it unnec,ssary to check for
、
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一
暉
︼
り3e the sainpling vessel(522電
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6.5.2 Sampling operation
iS0 12312001(E)
Sampling tube(5222)as apprOpriate
盗 ]亀 nt::続籠 i:田 1贈 I旱 :混』:鳥 :ピね:(‖ :w:ξ
∬ 出 lltttT:ば寵 ir鵠儡壇檸龍￨::￡ ¶
the contents to a beaker(53)TranSferthe latex tO a sample bOttle(54)leaving an air space of 2 96 to 5 『
9も
the cap Fi「 1311y onto the botile
:据
よ
Screw
乳
寵:烏僣ど
温:穐 :当胤誦t,ll謬 lFt寵 )鳳hT織『
私:W鷺 1::よ
O and'° m hebeabゎ he sam¨ bぬし
yT滉讐ξ
燈
ng an arspace d
:魁諾∫
:器漱:讐牌
￡l:宙 iよ
:鳥 ]亀 n町:∬ :1:1:]器
￨:Pt階
ri首
,電
a゛
6.5.3 Testing for hOmogeneity
iakeseparatesalllplesapprOxirnatelyloommfrolrthetopsurfaceandloornmfromthebottomsurfaceofthelatex
瀬
髭
h塑
樵
酬
弱鮮
I蠅
l場J鰐
from the top and the bOttom agree wlthin this tOlerance
暴
i距
謂
:憩
憲
孵
粥
謝
li隠
壇
J
6.5.4 Taking the labOratory sample
Aller he degree d hOmOgene‖ y specttod h a53 has b=tttli∬
「iξ 響¶よ:憑醤:精牌:
常
∬混理
1篤
esam口 eS h a beak釘優
O and
Pぽ rs蹴
f:]精棚獅Ъ
鞘寵T『累首
ttir:群 l轟超
滉』:"InehehЮ
は
?暦 t誦 ::凧 :竃
♀
ぽ ξ
lT柁￡
‰機動il∴ 織
ぞ穐::瞭∫
i認鷲
1:楓よ
rhebdbmendhettOpen
approximately halfway betⅥ /een the tOp and centre ofthe
bよ
::ツ :i」
[::鷺
:な
lλ
6.5.5 Coagulum content
T卜 le
coaguiulT cOnterli(1〔 3こ)706,sllali be dete「 iTlirieO oFl ihe iabolatOly sa,ll口
le tsee 3 3)
6.6 PFepaFat[0瞼 orthe test samp[e
::翻 :「
∬譜 ∬1∫ 軍Lf」『
‖讐
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l首
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明
i[堰 l,肌 ζ
よ
謝穐(認濡T富
ｅｅ
ｈ
ｈ
d嘗 &雪 Yn:]肥:堰
7 LQbelling the laboratory sample and the test samp[e
The samples sha‖ be clearly labe‖ ed and cOntain On the labelthe fo‖ O、へ
/ing lnformatloni
a) a deSCription ofthe material;
さ)t「 le size and Pariiculars oithe cOnsignrnent(la‐ lk― lA/390■
C) the designat on“ laboratory sarrple“
o「
,tailた ,3れ ip,bar「 ei o「
儘:u t71,:
“
test sample'and thE relerence ntimbei of tlne salη plei
d)the Consigno「
:
e)the place of samplin9:
1) the llate ol saimpllngi
g)the name Ofthe sampler
Dls0 2001-AI「
t
ighis reserved
J
:SΦ 弩23]2001(厘 )
S SamOling report
丁he sa1lnp ing report shall colltain the fo‖
ooヘ
ノ
ing inforlη ationi
a) a reference to this lnteFnatiOrlal(3tandardi
b) all details necessary forthe identificatlon of the material sampled;
C, the frequency oi sampling;
d) a reCOrd Of creaming;visible gross coagじ lum,skin and foreign matter(if any)preSentin the originai container;
e) ar)y unusualfeatures noted during the sampling;
f) a reCOrd
へ
、
/hether or not the tank car or tank
hornogeneity:
、
ヘ
ノ
as initia‖ y
homogeneous and the acilon taken to achieve
g) any Operatlon notincluded in this lnternational Standard or regarded as optional
0.
O r.3C 20Cl
-
All rights reserved
:S012312001(E)
iCS 83.040.:⑬
Prce based on 8 pages
O IS0 2001-AII百 ghts reserved
・

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