1、Designation:E134690(Reapproved 2010)Standard Practice forBulk Sampling,Handling,and Preparing Edible VegetableOils for Sensory Evaluation1This standard is issued under the fixed designation E1346;the number immediately following the designation indicates the year oforiginal adoption or,in the case o
2、f revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the recommended procedures forbulk sampling,handling,and preparing edible veget
3、able oil(liquid at room temperature)prior to sensory evaluation.1.2 This practice is consistent with the background infor-mation presented in ASTM STP 433,ASTM STP 434,andASTM STP 758.These should be consulted for supplementalguidance.1.3 The values stated in SI units are to be regarded asstandard.T
4、he values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of
5、 regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Publications:2ASTM STP 433 Basic Principles of Sensory EvaluationASTM STP 434 Manual on Sensory Testing MethodsASTM STP 758 Guidelines for the Selection and Training ofSensory Panel Members2.2 AOCS Standard:3Method C1-47 Sampling3.S
6、ummary of Practice3.1 This practice consists of the following basic steps:removing oil from bulk source,transporting and starting oilprior to evaluation,preparing oils for evaluation,presentingsamples to panel,and cleaning glassware.4.Significance and Use4.1 This practice is designed for use by the
7、oil processor orresearch laboratory for evaluation by a trained sensory panel,or for use by quality control(QC)and quality assurance(QA)personnel for sampling from a tank truck,car,or any other bulktransportation container,or by both.4.2 The consistent use of this practice will provide repre-sentati
8、ve samples for all sensory,chemical and physicalanalyses and will protect the oil from oxidation.4.3 The objective of this practice is to ensure that the sampleis representative of the sample source from the time ofsampling until the time of evaluation and to protect oil qualityduring that time.4.4
9、This practice addresses neither evaluation and scalingtechniques,nor the sampling,handling,and preparing of solidfats.5.Apparatus5.1 Liquid Zone Sampler,3or core sampler,or trier.4,55.2 Wide-Mouth Jars,made of polyethylene terephthalate,0.5 to 1.0 L.5.3 Amber Glass Bottles,250 mLto 1 L,with narrow-m
10、outhtops that will withstand freezer temperatures.5.4 Plastic Caps with Liners,or tape(PTFE pipe threadtape),to cover top of bottle opening before capping with newnon-metallic screw type caps.Tape should be 2.5 cm in widthor wider to completely cover bottle openings.5.5 Glass Funnels.5.6 Glove Box w
11、ith inert gas nitrogen atmosphere,includingan oxygen scavenging device.5.7 Glass Vial,50 mL.Use amber glass for flavor evaluationand clear glass for visual examination of oil.5.8 Standard Disposable Glass Pipets,10 mL,one per eachsample.5.9 Circulating Waterbath,with automatic timer,thermostatand ra
12、ck.1This practice is under the jurisdiction of ASTM Committee E18 on SensoryEvaluationand is the direct responsibility of Subcommittee E18.06 on Food andBeverage Evaluation.Current edition approved Aug.15,2010.Published December 2010.Originallyapproved in 1990.Last previous edition approved in 2006
13、as E1346 90(2006).DOI:10.1520/E1346-90R10.2Available from ASTM International Headquarters,100 Barr Harbor Drive,POBox C700,West Conshohocken,PA 19428-2959.3Available from American Oil Chemists Society,P.O.Box 3989,Champaign,IL 61826.4Available from Zone Devices,Inc.,San Rafael,CA.5Available from Ref
14、inery Supply Co.,Tulsa,OK.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.10 Waterbath Thermometer,with range from 20 to 100Cin 1C divisions,calibrated for 76 mm immersion,305 mmlong.6.Precautions6.1 Oil submitted for chemical and physi
15、cal testing and forsensory evaluation should be from the same bulk sampling.Tank trucks,cars,or any other bulk transportation containersmay be filled with as many as seven layers and each level of oilmay be slightly different in quality.Oil samples should behandled in the same manner and time frame
16、to ensure high datacorrelation.6.2 Do not expose oil to any environmental condition(forexample,light,heat,oxygen,moisture)or any equipment(metals)that will cause oxidation of the oil and alter sensorycharacteristics of the oil.6.3 Use only new,clean,dry,and odor-free polyethyleneterephthalate wide-mouth jars to collect oil samples;dispose ofjars rather than cleaning them.6.4 Flush bottles with nitrogen in a glove box prior to fillingthe bottle.6.5 Obtain a representative oil sample for all evalu