广东化工
廣東化工
엄동화공
GUANGDONG CHEMICAL INDUSTRY
2012年
8期
79-80
,共2页
砷含量%石墨炉原子吸收光谱%海产品%基体改进剂%原子化温度
砷含量%石墨爐原子吸收光譜%海產品%基體改進劑%原子化溫度
신함량%석묵로원자흡수광보%해산품%기체개진제%원자화온도
arsenic content%GFAAS%seafood%matrix modifier%atomization temperature
石墨炉原子吸收光谱法是一种操作简便、灵敏度高、检出限低的元素测定方法,但测砷时有较为严重的基体干扰。本研究采用不同基体改进剂以消除基体干扰,优化了原子化温度,对比了不同的消解方法,建立了海洋产品中砷的石墨炉原子吸收的测定方法。最佳原子化温度为2750℃,以氯化钯与硝酸镍混合液为基体改进剂,可以得到较好结果。高氯酸浓度升高,虾粉的测量结果下降,盐酸浓度小于等于1%,对虾粉的测定结果影响不显著,达到3%后,虾粉的测定结果显著下降。砷与钠、钾、钙、镁的比例为1∶400,结果显示离子没有干扰,砷与铁的比例为1∶200,结果显示没有干扰。
石墨爐原子吸收光譜法是一種操作簡便、靈敏度高、檢齣限低的元素測定方法,但測砷時有較為嚴重的基體榦擾。本研究採用不同基體改進劑以消除基體榦擾,優化瞭原子化溫度,對比瞭不同的消解方法,建立瞭海洋產品中砷的石墨爐原子吸收的測定方法。最佳原子化溫度為2750℃,以氯化鈀與硝痠鎳混閤液為基體改進劑,可以得到較好結果。高氯痠濃度升高,蝦粉的測量結果下降,鹽痠濃度小于等于1%,對蝦粉的測定結果影響不顯著,達到3%後,蝦粉的測定結果顯著下降。砷與鈉、鉀、鈣、鎂的比例為1∶400,結果顯示離子沒有榦擾,砷與鐵的比例為1∶200,結果顯示沒有榦擾。
석묵로원자흡수광보법시일충조작간편、령민도고、검출한저적원소측정방법,단측신시유교위엄중적기체간우。본연구채용불동기체개진제이소제기체간우,우화료원자화온도,대비료불동적소해방법,건립료해양산품중신적석묵로원자흡수적측정방법。최가원자화온도위2750℃,이록화파여초산얼혼합액위기체개진제,가이득도교호결과。고록산농도승고,하분적측량결과하강,염산농도소우등우1%,대하분적측정결과영향불현저,체도3%후,하분적측정결과현저하강。신여납、갑、개、미적비례위1∶400,결과현시리자몰유간우,신여철적비례위1∶200,결과현시몰유간우。
Graphite furnace atomic absorption spectrometry（GFAAS） is an easy,high-sensitive and low-detection-limit method for detection of chemical elements.However,serious interference of matrix sometimes occurs when this assay is applied on arsenic detection.In this study we established a method for detection of the arsenic content in seafood via GFAAS by using a variety of matrix modifiers to eliminate interference of matrix,optimizing the atomization temperature and evaluating different digestion methods.It was indicated that nice result could be obtained at the optimal atomization temperature as 2750 ℃ and with the mixture of palladium chloride and nickel nitrate as matrix modifier.This method was then evaluated by arsenic detection in shrimp powder.The result showed that the value of arsenic content went down as the concentration of perchloric acid went up,and that variation of the value was insignificant when the concentration of hydrochloric acid was lower than 1 %,whereas significantly decreased when the concentration ranged from 1 % to 3 %.Furthermore,no interference of matrix was observed when the concentration ratio of arsenic to sodium,potassium,calcium or magnesium was 1：400,and when the ratio of arsenic to ferrum（iron） was 1：200.
