REFERENCES
- Vandecasteele , C. and Block , C. B. 1993 . Modern Method for Trace Element Determination , 100 New York : Wiley .
- Honda , K. , Sahrul , H. , Hidaka , H. and Tatsukawa , R. 1983 . Agric. Biol. Chem. , 47 : 2521
- Liao , Z. J. 1989 . Pollution, hazard, migrate and transform of microamounts heavy metal elements in evionment″(Ch) , 28 Beijing : Science Press .
- Patel , B. , Henderson , G.E. , Haswell , S. J. and Grzeskowiak , R. 1990 . Analyst , 115 : 1063
- Grans , D. C. , Gottlieb , M. Shaia , Tawara , J. , Bunch , R. L. and Thiesen , L. A. 1990 . Biochem. , 188 : 53
- Balaji , B. K. , Saravanakumar , G. , Murugesan , P. and Mishra , G. 1998 . Talanta , 46 ( 6 ) : 1299
- Nelson , W. L. 1973 . Oil Gas,J. , 71 : 54
- Wang , H. T. , Li , Q. and Xu , Q.H. 1995 . Huaxue Tongbao , 2 : 41
- Li , Q. and Xu , Q. H. 1995 . Fenxi Shiyanshi , 14 ( 3 ) : 8 ibid Fenxi Huaxue 1994
- Yan , G. Y. and Wang , D. H. 1995 . Lihua Jianyan, Huaxue Fence , 31 ( 1 ) : 25
- Liu , F. Z. 1992 . Yejin Fenxi , 12 ( 5 ) : 1
- Jackson , K. W. and Qiao , H. 1992 . Anal. Chem. , 64 : 50R
- Jackson , K. W. and Mahamood , T. M. 1994 . Anal. Chem. , 66 : 252R
- Adachi , A. , Asai , K. , Koyama , Y. , Matsumoto , Y. and Okano , T. 1998 . Anal. Lett. , 31 ( 10 ) : 1769
- da Silva , W. G. P. , Campos , R. C. and Miekeley , N. 1998 . Anal. Lett. , 31 ( 6 ) : 1061
- Xiang , L. R. and Wang , X. 1995 . Fenxi Shiyanshi , 14 ( 4 ) : 26
- Li , S. Q. 1995 . Xian Dizhi Xueyuan Xuebao , 17 ( 4 ) : 83
- Wang , G. H. and Zhang , Y. X. 1994 . Fenxi Shivanshi , 13 ( 3 ) : 52
- Li , X. C. and Tang , Y. P. 1994 . Yejin Fenxi , 14 ( 3 ) : 14
- Wildhagen , D. , Krivan , V. , Gercken , B. and Pavel , J. 1996 . J. Anal. At, Spectrom , 11 ( 15 ) : 371
- Skin , M- X. 1993 . Fenyi Shiyanshi , 12 ( 5 ) : 64
- Zhou , C. L. , Lu , Y. , Li , X. L. , Cao , W. and Zhao , Y. C. 1998 . Fenxi Huaxue , 26 ( 8 ) : 970
- Li , C. J. and Li , C. 1998 . Lihua Jianyan, Huaxue Fence , 34 ( 3 ) : 117
- Puri , S. , Dubey , R. K. , Gupta , M.K. and Puri , B.K. 1998 . Talanta , 46 ( 4 ) : 655
- Wang S.H. Du L. Y. , Fenxi Huaxue , 21 ( 4 ), ( 1993 ); 493 ibid, Lihua Jianyan, Huaxue Fence, 31(1), 14(1995)
- Jiang , Z. L. 1991 . Fenxi Huaxue , 19 ( 1 ) : 111
- Zhu , H. Y. and Zhu , C. Y. 1995 . LiHua Jianya, Huaxue Fence , 31 ( 4 ) : 217
- Massoumi , A. and Tavallali , H. 1998 . Anal. Lett. , 31 ( 1 ) : 193
- Angulo , R. , Lopez-Cueto , G. and Ubide , C. 1998 . Talanta , 46 ( 1 ) : 63
- Zhang , A. M. 1998 . Fenxi Huaxue , 26 ( 3 ) : 325
- Wang , G. J. , Wang , Y. F. , Sun , X. X. and Jianyan , Lihua . 1997 . Huaxue Fence , 33 ( 3 ) : 126
- Zhang , Z. Q. and Zhan , H. Y. 1996 . Fenxi Huaxue , 24 ( 2 ) : 172
- Wang , S. H. and Zhang , A. M. 1996 . Fenxi Huaxue , 24 ( 7 ) : 832
- Wang , S. H. and Du , L. Y. 1995 . Fenxi Shiyanshi , 14 ( 3 ) : 70
- Zhu , H. Y. and Yang , X. Y. 1994 . Fenxi Shiyanshi , 13 ( 3 ) : 38
- Clien , L H. and Luo , D. 1997 . Fenxi Huaxue , 25 ( 6 ) : 656
- Yu , Y. , Hong , C. H. , Wu , Z. Q. , Wang , R. Q. and Huang , J. F. 1996 . Fenxi Huaxue , 24 ( 4 ) : 479
- Yu , Y. , Hong , C. H. , Huang , J. F. and Wang , R. Q. 1996 . Fenxi Huaxue , 24 ( 10 ) : 1147
- Yu , Y. , Nie , R. H. , Huang , J. F. and Xiong , P. P. 1995 . Fenxi Huaxue , 23 ( 8 ) : 903
- Zheng , L. 1988 . Huaxue Shiji , 10 ( 6 ) : 377
- Chen , G. Z. , Huang , X. Z. , Zhang , Z. Z. , Xu , J. G. and Wang , Z. B. 1990 . Fluorimetric Analytical Method , 2nd Edn , Beijing : Science Press .