J. Flow Injection Anal., Vol.9, No.2 (1992) Department of Chemistry, Rikkyo (St. ~aul's) university--

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1 J. Flow Injection Anal., Vol.9, No.2 (1992) REVERSED FLOV-INJECTION ANALYSIS AND ON-LINE CHEMICAL MONITORING IN THERMAL POWER PLANTS Li Yong-sheng% and Yoshio Narusawa Department of Chemistry, Rikkyo (St. ~aul's) university Nishi-Ikebukuro. Toshima-ku. Tokyo 171 On-line monitoring with reversed flow-injection analysis (rfia) in the thermal power plants is described. These methods are as follows: a rapid rpia on-line monitoring of phosphate ion in boiler water, rfia on-line method of determination of silicate ion in bioler water, a simultaneous rfia determination of phosphorus and silicon in steam water, an rfia online determination of copper in steam water, an rfia method of determination of sulfate ion in power plant water and natural water, and spectrophotometric rfia determination of exchange capacity for ion-exchange resin. IÂ m e

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6 Â? 0-7 ;hi\, ~ El 4 ICTK-f-. Fig 4. Simultaneous on-line determina- Z a:a"&dsâ '51'"?$> -1' tion of phosphate and silicate with rfia WJLj+flSil-?T'3 hi^-i2 Rv. Rtl-Ammonium molybdate(1, 0%. 10%(w/v)); a/0â ffiâ t^iilp 3-j+ (l:si03'-3 RA-Reducing agent(ascorbic acid or SnC12); (l: 0IÂ ^C ESiJ+%/cTo -E RC,. RCz, RCs-Reaction coils(id mm); Olk-B^H ^I TI^ QtC OX-Masking agent( Oxalic acid).

7 Cao 6 14' Hz02?:,^ 6 b K u Fig 5. Flow manifold used for deter- 03@~bEEKfctj-5Cu( )a@^ mination of trace copper with rfia

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12 [l I J. Ruzicka, and E. H. Hansen, Anal. Chin. Acta, 1975, 78, 145. [2 I K. S. Johnson, and R. S. Petty, Anal. Chem., 1982, 54, [3 1 Cheng Wei-cai. and Wang zhong- jia, <Aj~%S%<b?tf-%), ^WS XJiStt, (ISBN ) I S?Jtfa#tH%%ffi, <?%AM%#&/kMN K7-Y 9), 1985, [5 I Li Yong-sheng, Jilin Dianli Jishu, 1989, 80(2), 10. [6 I Li Yong-sheng and Cheng Wei-cai, (MSItfiff) No , MSXJigtt, [7 I Zhang Hai-ping, Pan Hong-ze and Cheng Wei-cai, Fengxi Shiyanshi, (6). 31. [8 1 Sun Li- jing and Fang Zhao-lun, Fengxi Huaxue, 1981, 9, 586. [9 I Dan Dezhong, Van Yuping and Du Gu, Fenxi Shiyanshi, 1991, 10(2), 59. [ 101 Li Yong-sheng, LihuaJianyan, 1990, 26(1), 40. [ 111 fs^.^i.ey27jc*n@$%^n^s, <AA%SOT7Jc&%B9WZjÂ. 7JcN E-f] XKK^, 1984, No [ 121 Li Yong-sheng, Dianli Jishu, 1990, 23(1), 21. [I31 Zhang Hai-ping, Yue Hui-ling and Li Yong-sheng, Gongye Suichuli, 1987, 7(5), 42. [ 141 Cao Shun-an and Zhong Jin-chang, Guolu Suichuli, 1988, 4(1), [I51 Yuan Shi-ping, Gongye Suichuli, 1987, (4). 50. [ 161 Li Yong-sheng and Cheng Vei-cai, Fengxi Yiqi, 1986, 69(3), 46. [ 171 Li Yong-sheng, DianliShe ji yu SuichuliDongtai, 1984, (1 ), [ 181 S. Baban, D. Beetlestone, D. Betteridge, and P. Sweet, Anal. Chim. Acta, 1980, 114, 319.

Department of Chemistry, College of Science, Rikkyo (St.Paulls) University. phosphorus in mussel, tea-leaves, sargasso and rice flour (NIES CRM) with

Department of Chemistry, College of Science, Rikkyo (St.Paulls) University. phosphorus in mussel, tea-leaves, sargasso and rice flour (NIES CRM) with P r e l i m i n a r y s t u d y o f m a t r i x effect on t h e s i m u l t a n e o u s d e t e r m i n a t i o n of silica and phosphate w i t h on-line c o l u m n F I A s p e c t r o p h o t o m e t