粮食与食品工业
糧食與食品工業
양식여식품공업
CENEAL AND FOOD INDUSTRY
2012年
5期
68-70
,共3页
张苗%陶琳%王丽虹%许健%项海波%许宏民%孙计赞
張苗%陶琳%王麗虹%許健%項海波%許宏民%孫計讚
장묘%도림%왕려홍%허건%항해파%허굉민%손계찬
微波消解%石墨炉原子吸收%果汁%铅%镉
微波消解%石墨爐原子吸收%果汁%鉛%鎘
미파소해%석묵로원자흡수%과즙%연%력
microwave digestion%GFA%fruit juice%Pb%Cd
应用具有温度传感器附件的Ethosl型微波消解仪处理果汁样品,并采用石墨炉原子吸收法对其中铅、镉含量进行测定。对消解试剂和微波消解条件进行了筛选和优化,研究了石墨炉原子吸收的测定条件。研究表明,以HN0,-H202(7:1,V/V)作为微波消解试剂,180℃,1200W,消解8min最佳。在基体改进剂NH4H2PO4存在下,可有效地消除基体的影响,建立了微波溶样原子吸收光谱法测定果汁中Pb、Cd的方法,其Pb和Cd的检测限分别为6.0/μg/L和1.0μg/L。将该法应用于果汁样品中Pb、Cd的测定,结果令人满意,RSD小于5.0%,Pb回收率为78.7%~102.49,6,Cd回收率为97.89,6~108.7%。通过试验,提出在微波消解前,在电热消解仪上进行预消解(140℃,20min),增大了称样量,显著降低了方法的检出限。微波消解法处理果汁样品,具有快速、简便、节约试剂、消解完全等特点,测定结果的精密度、准确度令人满意。
應用具有溫度傳感器附件的Ethosl型微波消解儀處理果汁樣品,併採用石墨爐原子吸收法對其中鉛、鎘含量進行測定。對消解試劑和微波消解條件進行瞭篩選和優化,研究瞭石墨爐原子吸收的測定條件。研究錶明,以HN0,-H202(7:1,V/V)作為微波消解試劑,180℃,1200W,消解8min最佳。在基體改進劑NH4H2PO4存在下,可有效地消除基體的影響,建立瞭微波溶樣原子吸收光譜法測定果汁中Pb、Cd的方法,其Pb和Cd的檢測限分彆為6.0/μg/L和1.0μg/L。將該法應用于果汁樣品中Pb、Cd的測定,結果令人滿意,RSD小于5.0%,Pb迴收率為78.7%~102.49,6,Cd迴收率為97.89,6~108.7%。通過試驗,提齣在微波消解前,在電熱消解儀上進行預消解(140℃,20min),增大瞭稱樣量,顯著降低瞭方法的檢齣限。微波消解法處理果汁樣品,具有快速、簡便、節約試劑、消解完全等特點,測定結果的精密度、準確度令人滿意。
응용구유온도전감기부건적Ethosl형미파소해의처리과즙양품,병채용석묵로원자흡수법대기중연、력함량진행측정。대소해시제화미파소해조건진행료사선화우화,연구료석묵로원자흡수적측정조건。연구표명,이HN0,-H202(7:1,V/V)작위미파소해시제,180℃,1200W,소해8min최가。재기체개진제NH4H2PO4존재하,가유효지소제기체적영향,건립료미파용양원자흡수광보법측정과즙중Pb、Cd적방법,기Pb화Cd적검측한분별위6.0/μg/L화1.0μg/L。장해법응용우과즙양품중Pb、Cd적측정,결과령인만의,RSD소우5.0%,Pb회수솔위78.7%~102.49,6,Cd회수솔위97.89,6~108.7%。통과시험,제출재미파소해전,재전열소해의상진행예소해(140℃,20min),증대료칭양량,현저강저료방법적검출한。미파소해법처리과즙양품,구유쾌속、간편、절약시제、소해완전등특점,측정결과적정밀도、준학도령인만의。
In order to determine Pband Cd in fruit juice, fruit juice was digested and treated with microwave to detect them by GFA in this paper. We selected the best sample processing method and the excellent measurement condition. The results showed that the optimum digestion conditions are as follows: digestion conditions: HNO3 - H202 (7 : 1,V/V), 180 ℃, 1 200 W, 8 min. The RSD of this method is less than 5.0%. The limit of this method is: Pb 6.0/1g/L, Cd 1.0μg/L; The recovery of the method is: Pb 78.7%~102.4%, Cd 97.8%~108.7%. The de- tection limit was also decreased by increasing the sampling amount by pre-digestion at 140 ℃, 20 min. The results show that this method is simple, accurate and fast.