ASME_E2407-2004 消泡试验标准

美国机械工程师协会标准，消泡剂类

Designation:E2407–04
StandardTestMethodfor
EffectivenessofDefoamingAgents1
ThisstandardisissuedunderthefixeddesignationE2407;thenumberimmediatelyfollowingthedesignationindicatestheyearof
originaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.A
superscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.
1.Scope
1.1Thistestmethoddescribesaqualitativemethodforthe
evaluationofliquiddefoamingagentsusedtocontrolundesir-
ablefoamindilute,aqueoussurfactantsolutions.Thislabora-
torytestmethodmaybeappliedtoaqueoussystemscontaining
additionalcomponents,suchasagriculturalchemicals.This
methodisdescribedusingSIunits
1.2 Thisstandardmethoddoesnotpurporttoaddressallof
thesafetyproblems,ifany,associatedwithitsuse.Itisthe
responsibilityoftheuserofthisstandardtoestablishappro-
priatesafetyandhealthpracticesanddeterminetheapplica-
bilityofregulatorylimitationspriortouse.
2.ReferencedDocuments
2.1 ASTMStandards:E2407–04

2
E1116StandardTestMethodforEmulsificationCharacter-
isticsofPesticideEmulsifiableConcentrates
E1519StandardTerminologyRelatingtoAgriculturalTank
MixAdjuvants
3.Terminology
3.1 Definitions:
3.1.1 defoamingagent, n—amaterialthateliminatesor
suppressesfoaminthespraytank. E1519
3.1.2 durability, adj—thedegreetowhichadefoaming
agentremainseffectiveovertimeunderfoamgenerating
conditions
3.1.3 foamingagent, n—amaterialthatincreasesthevol-
umeorstabilityofthefoamformedinaspraymixture
4.SummaryofTestMethod
4.1Foamisgeneratedinahigh-speedblenderwithadilute
surfactantsolutionpriortoadditionofadefoamingagenttothe
blendercup.After1minofgentleagitationandfiveminof
rest,anyremainingfoamismeasured.Theabilityofthe
defoamingagenttoreducefoamisexpressedaspercentfoam
reduction.
5.SignificanceandUse
5.1Thistestisdesignedtodeterminetheabilityofa
materialtoreduceoreliminateundesirablefoamthatcanbe
generatedduringthemixingandapplicationofagricultural
chemicalsindiluteaqueousmixtures.
5.2Thismethodisusefulfortestingliquiddefoaming
agents,suchas“siliconeemulsion”or“organic”typedefoam-
ingagents.Inprinciple,itmightalsobeusedtotestdry
antifoamagentswithminormodificationstotheprocedure.
5.3Thismethodcouldbeemployedtodeterminethe
relativeeffectivenessofonedefoamingagentversusanother.It
islefttotheuserofthismethodtointerprettheresultswith
respecttotheactualfielduseofthedefoamingagentstested.
5.4Thismethodassumesthatthedefoamingagentbeing
testedhassufficientdurabilitytomaintainitsactivityforthe
durationofthetest.
5.5Sodiumlaurylethersulfateasthefoamingagentis
describedinSection 7,Reagents.Ifdesiredtheuserofthistest
methodmayselectanalternativesuitablefoamingagent.
6.Apparatus
6.1 Blender—Theblendershouldhavearemovable1.2liter
glasscupequippedwitharemovablestainlesssteelblade
assembly(Note1),andamotorbasecapableofano-load
speedof22,000rpm.
NOTE 1—Thebladeassemblyshouldturnfreelybyhand.Ifitdoesnot,
replacetheassemblybeforeusingthistestmethod.
6.1.1 Blenderassembly— Plugthepowersupplycordofthe
blenderintothepoweroutletofavariabletransformerwitha
0to120Voutput.Plugthetransformerintoa115Vground
faultprotected(GFCI)powersource.Usingwater,anelec-
tronicbalance,andamarkingpen,mark50mLgraduationson
theglassblendercup,from200to1000mL.Thisiseasilydone
byplacingtheblendercuponthebalance,taringthebalance,
thenadding50gwaterandmarkingthewaterlevelonthe
exteriorofthecup.Continueadding50gwateratatimeand
markingthewaterleveluntilthecupcontains1000g.See Fig.
1.E2407–04
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE35on
PesticidesandAlternativeControlAgentsandisthedirectresponsibilityof
SubcommitteeE35.22onPesticidesFormulationsandDeliverySystems.
CurrenteditionapprovedOct.1,2004.PublishedNovember2004.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,or
contactASTMCustomerServiceatservice@astm.org.For AnnualBookofASTM
Standards volumeinformation,refertothestandard’sDocumentSummarypageon
theASTMwebsite.