简介：摘要目的建立一种油脂和食品中用甲醇将BHA、BHT溶解出来，在拟定的测定参数下，直接进样分离，检测的方法。方法采用C18（250×4.60mm）色谱柱，流动相为0.02mol/L乙酸铵-甲醇（955体积比），流速1ml/min，紫外检测波长280nm；进样量20μl；外标法定量。结果方法标准曲线线性良好，BHA回归方程为Y=2.127X-3.24，回归系数r=0.9997；BHT回归方程为Y=60.32X+0.70，回归系数r=0.9998。添加质量浓度为0.01%～1.0%时BHA的回收率为93.6%～103.9%，BHT的回收率为97.5%～108.5%。结论该方法操作简单、准确、回收率高，精密度良好，重现性好，可用于食用油、饼干等食品中BHA、BHT的测定。

简介：UHMWPEcompositesreinforcedwithBovineBoneHydroxyapatite(BHA)indifferentcontentswerepreparedbyheatpressingformationmethod.AhipjointwearsimulatorwasusedtoinvestigatethebiotribologicalbehaviorofUHMWPE/BHAcompositeacetabularcupsagainstCoCrMoalloyfemoralheadsinbovinesynovialubricationat37±1℃.ItwasfoundthattheadditionofBHApowdertoUHMWPEcanimprovethehardnessandcreepmodulusofUHMWPE/BHAcomposites,anddecreasetheirwearratesunderbovinesynovialubrication.WhenthecontentofBHAfillerparticleswasupto30wt%,UHMWPE/BHAcompositesdemonstratedthewelldesignperformancesofthesurfaceandbiotribologicalproperties.Fatigue,ploughingandslightadhesivewearwerethemainwearmechanismsforUHMWPEanditscomposites.Inaddition,thesizesofwearparticlesbecamelargerwithanincreaseinBHApowderaddition.TheseresultssuggestthatBHAfillerisadesirablecomponenttoincreasethewearresistanceofUHMWPE/BHAcompositesforbiomedicalapplications.

简介：目的：评价液相色谱法测定油脂食品中叔丁基羟基茴香醚（BHA）的不确定度；方法：分析不确定度来源，建立分析结果的数学模型，计算不确定度分离、结果的合成不确定度及扩展不确定度。结论：测量不确定度可坩于高效液相色谱法测定油脂食品中叔丁基羟基茴香醚（BHA）含量测定结果的评定。