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Determination of moistureDetermination of moisturecontentcontent

in Japanin Japan

Routine reference methodRoutine reference method

 JapaneseStandard 

 JPN (105 JPN (105˚C)˚C)

1

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1. Appication1. Appication

!.!. De"nition #. Apparatus#. Apparatus

$.$. Procedure 5.5. Cacuation and e%pression of

resuts

&. R&. Re'ision

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1.Appication1.Appication

 his method is appied to

padd*+ ,ro-n rice+ -hite rice+-heat + ,are*+ naed ,are*+ ,uc-heat + so*,ean and ,eans in form

of /rain

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!. De"nition!. De"nition

oss in mass+ e%pressed as aoss in mass+ e%pressed as apercenta/e+ under/one ,* the productpercenta/e+ under/one ,* the product

under the conditions speci"ed in thisunder the conditions speci"ed in thisstandardstandard

oisture content is e%pressed as aoisture content is e%pressed as apercenta/epercenta/e

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#. Apparatus#. Apparatus

1) Ana*tica ,aance1) Ana*tica ,aance

!) 2rindin/ mi!) 2rindin/ mi 

#) eta dish#) eta dish$) 3'en$) 3'en 

5) Desiccator5) Desiccator

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#. Apparatus41#. Apparatus41

1) Ana*tica1) Ana*tica,aance,aance

 Capa,e ofCapa,e of-ei/hin/ to an-ei/hin/ to an

accurac* of accurac* of 

  0.1m/0.1m/

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 #. Apparatus4!#. Apparatus4!

!)!) 2rindin/ mi2rindin/ mi

  not a,sor,not a,sor,

moisture+ eas* tomoisture+ eas* tocean+cean+

-ithout heat+-ithout heat+ti/htness to air+ti/htness to air+

at !0at !0˚C˚C and &06and &06R.7.R.7.

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 #. Apparatus4##. Apparatus4#

#)#) eta disheta dish

  Non4corrodi,e+Non4corrodi,e+

ti/ht4"ttin/+ti/ht4"ttin/+  AuminumAuminum

container+container+

  a diameter ofa diameter of 5050～～ &0 mm&0 mm andandhei/ht ofhei/ht of !5 mm!5 mm

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 #. Apparatus4$#. Apparatus4$

$)$) 3'en3'en  Constant andConstant and

sta,esta,e forfor 5hr at5hr at

10&.510&.5˚C˚C 1.01.0˚C˚C++andand  correspond tocorrespond to

the a,orator*the a,orator*conditioncondition 

at !0at !0˚C˚C andand&06 R7.&06 R7.

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 #. Apparatus45#. Apparatus45

5)5) DesiccatorDesiccator

  Containin/ anContainin/ an

e8ecti'ee8ecti'edesiccantdesiccant

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$. Procedure41$. Procedure41 

 he resut is the arithmetic he resut is the arithmeticmean of t-o separatemean of t-o separatedeterminations of thedeterminations of themoisture contents -hichmoisture contents -hichmeet themeet the repeata,iit*repeata,iit*re9uirementre9uirement++

  sha not e%ceedsha not e%ceed 0.16.0.16.Round the resut toRound the resut to one pacesone paces

of decimas.of decimas.

 1)1) :ei/h empt* dishes to the:ei/h empt* dishes to the

nearestnearest 0.1m/0.1m/ 

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$. Procedure4!$. Procedure4!

!)!)  est portion est portion;n case of sampes to;n case of sampes to,e /round+ pro'ide a,e /round+ pro'ide atest portiontest portion si/ht*si/ht*

/reater than 5//reater than 5/,efore /rindin/+ and,efore /rindin/+ and-ei/h a the /rind.-ei/h a the /rind.

 

:ei/h the test:ei/h the testportions afterportions after/rindin/ to the/rindin/ to thenearestnearest 0.1m/0.1m/..

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$. Procedure4#$. Procedure4#

#)#)  Dr*in/ Dr*in/  Pace the open dishesPace the open dishes

containin/ the testcontainin/ the testportions to/ether -ithportions to/ether -ith

the ids in the o'enthe ids in the o'enand ea'e forand ea'e for5hr5min5hr5min from thefrom themoment -henmoment -hen

  the o'en temperaturethe o'en temperature

is re/ained tois re/ained to 10&.510&.5˚C˚C 1.01.0 ﾟ゚ ˚C˚C..

  Do not open the o'enDo not open the o'endoor durin/ dr*in/.door durin/ dr*in/.

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$. Procedure4$$. Procedure4$

$)$)  :ei/hin/ :ei/hin/  :hen the:hen the

dishes ha'edishes ha'e

cooed to thecooed to thea,orator*a,orator*temperature+temperature+-ei/h them to-ei/h them to

the nearestthe nearest0.1m/.0.1m/.

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55. Cacuation and e%pression. Cacuation and e%pressionof resuts  of resuts

 he moisture content+ he moisture content+ mm%%+ e%pressed as+ e%pressed aspercenta/e ,* mass is /i'en ,* the foo-in/percenta/e ,* mass is /i'en ,* the foo-in/e9uations.e9uations.

mm%% --00)?1006)?1006

  -here-here --00 andand --11 are the -ei/hts+ in /rams+ ofare the -ei/hts+ in /rams+ ofthe test portion and the dried test portion+the test portion and the dried test portion+

respecti'e*.respecti'e*.

 he resut is the arithmetic mean of t-o he resut is the arithmetic mean of t-omeasurements 'aues -hich meet themeasurements 'aues -hich meet therepeata,iit* re9uirement+0.16.repeata,iit* re9uirement+0.16. Round theRound the05/15/16   15

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  &.Re'ision&.Re'ision

  105105 ˚C˚C.. method ismethod isa8ected ,* thea8ected ,* the

en'ironmentaen'ironmentacondition.condition.

(temperature and(temperature and

humidit*)humidit*)

 

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Rice Con'ersion ta,eRice Con'ersion ta,e

  Needed to countNeeded to countthethemeasurementmeasurement

resuts to theresuts to thereferencereferencecondition ofcondition of!0!0˚C˚C and &0and &0％％

R.7.R.7.

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Thank You for your attention!