河南科学
河南科學
하남과학
HENAN SCIENCE
2013年
4期
438-440
,共3页
吴红%焦九英%蒋松钰%王红莉
吳紅%焦九英%蔣鬆鈺%王紅莉
오홍%초구영%장송옥%왕홍리
氟化物%白菜%氟离子选择电极%硝酸-双氧水消解
氟化物%白菜%氟離子選擇電極%硝痠-雙氧水消解
불화물%백채%불리자선택전겁%초산-쌍양수소해
fluoride%cabbage%fluorine ion selective electrode%nitric acid-hydrogen peroxide digestion
本法用硝酸-双氧水消解烘干后的白菜,以柠檬酸钠溶液作离子强度缓冲调节剂并采用氟离子选择电极在pH 5~6时直接测定游离态氟离子浓度.方法标准偏差≤0.16,变异系数<5.44%,平均回收率为102.62%.
本法用硝痠-雙氧水消解烘榦後的白菜,以檸檬痠鈉溶液作離子彊度緩遲調節劑併採用氟離子選擇電極在pH 5~6時直接測定遊離態氟離子濃度.方法標準偏差≤0.16,變異繫數<5.44%,平均迴收率為102.62%.
본법용초산-쌍양수소해홍간후적백채,이저몽산납용액작리자강도완충조절제병채용불리자선택전겁재pH 5~6시직접측정유리태불리자농도.방법표준편차≤0.16,변이계수<5.44%,평균회수솔위102.62%.
@@@@In this work,the cabbage was digested by nitric acid-hydrogen peroxide firstly. Then,sodium citrate solution was used as the buffer to regulate the ionic strength. Finally,free fluoride ion concentration was determined by fluorine ion selective electrode at pH5~6. Standard deviation was 0.16,coefficient of variation was 5.44%,and average recovery was 102.62%.
