Sample thermaldecompositionfollowedbymercuryamalgamationandatomicabsorptionhasbeen
employedforthedeterminationofmethylmercury(MeHg)in fish. ThemethodinvolvesHBrleachingof
MeHg, extractionintotoluene,andback-extractionintoanaqueous L-cysteinesolution.Preliminary
studies werefocusedontheextractionefficiency,losses,contaminations,andspeciesinterconversion
prevention.Thelimitofdetectionwas0.018 mg g1 (dry weight).Theintradayprecisionforthree
replicateanalysisataconcentrationof4.2 mg g1 (dry weight)was3.5percent,similartotheinterday
precision accordingtoanalysisofvariance(ANOVA).Theaccuracywasguaranteedbytheuseoffortified
samples involving83–105percentrecoveries,andcertified referencematerialsTORT-2(lobster
hepatopancreas)andDORM-3(dogfish liver),providing107and98percentrecoveryofcertified values.
The greennessofthemethodwasalsoevaluatedwiththeanalyticaleco-scalebeingobtaineda final
score of73pointswhichmeansanacceptablegreenanalysis.Themethodwasappliedto fifty-seven
market samplesofdifferent fish acquiredfromlocalmarketsinseveralsamplingcampaigns.Thecontent
of MeHgfoundvariedbetween0.0311and1.24 mg g1 (wet weight),withvaluesthatinvolve33–129
percent ofthetotalmercurycontent.Someconsiderationsaboutfoodsafetywerealsodonetakinginto
account dataaboutSpanish fish consumeandTolerableWeeklyIntake(TWI)establishedforMeHg.
ตัวอย่าง thermaldecompositionfollowedbymercuryamalgamationandatomicabsorptionhasbeenemployedforthedeterminationofmethylmercury (MeHg) ในปลา ThemethodinvolvesHBrleachingofMeHg, extractionintotoluene, andback-extractionintoanaqueous L cysteinesolution.Preliminaryศึกษา werefocusedontheextractionefficiency ขาดทุน ปน andspeciesinterconversionป้องกัน Thelimitofdetectionwas0.018 มิลลิกรัมต่อกรัม (น้ำหนักแห้ง) 1 Theintradayprecisionforthreereplicateanalysisataconcentrationof4.2 มิลลิกรัมต่อ 1 กรัม (น้ำหนักแห้ง) was3.5percent, similartotheinterdayaccordingtoanalysisofvariance(ANOVA) ความแม่นยำ Theaccuracywasguaranteedbytheuseoffortifiedตัวอย่าง involving83-105percentrecoveries, andcertified referencematerialsTORT-2 (กุ้งhepatopancreas) andDORM-3(dogfish liver), providing107and98percentrecoveryofcertified ค่าสุดท้าย greennessofthemethodwasalsoevaluatedwiththeanalyticaleco-scalebeingobtainedaคะแนน of73pointswhichmeansanacceptablegreenanalysis Themethodwasappliedto 57ตลาด acquiredfromlocalmarketsinseveralsamplingcampaigns samplesofdifferent ปลา Thecontentของ MeHgfoundvariedbetween0.0311and1.24 มิลลิกรัม 1 (น้ำหนักเปียก), withvaluesthatinvolve33-129ofthetotalmercurycontent เปอร์เซ็นต์ Someconsiderationsaboutfoodsafetywerealsodonetakingintoบัญชี establishedforMeHg consumeandTolerableWeeklyIntake (TWI) ปลา dataaboutSpanish
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