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Abstract

Raman spectroscopy was employed as a means of determining the rate of decomposition of nitrite in solutions at various pH values. Nitrite decomposes with time in acidic medium, with an increase in decomposition rate as the concentration of acid increases. The mean decomposition rate of 0.625 mol/L NO⁻₂ in 1 mol/L HCl is 1.18 × 10⁻⁵ s⁻¹, with t_1/2 = 16 h. This rate explains the problems encountered when the flow injection analysis (FIA) version of the Shinn reaction is applied to certain nitrite samples mainly from acidic origin. Nitrite is potentially unstable, and all food and water samples should be analyzed as soon as possible after collection. If it is necessary to store the samples prior to analysis, the effects of the storage conditions on the stability of the analyte must be established in prior trials.

Keywords

Nitrite Nitrate Acidic Nonacidic Kinetics Raman

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References

Schuster

B. A.

and Lee

, J. Food Sci. 52, 1632 (1987).

West

P. W.

and Ramachandron

T. P

, Anal. Chim. Acta 35, 317 (1966).

Freemantle

Michael

, Chemistry in Action (Macmillan Education, Basingstoke, 1987), p. 563.

Burns

D. T.

Townshend

and Carter

A. H

, Inorganic Reaction Chemistry, Volume 2, Reactions of the Elements and their Compounds Part A: Alkali Metals to Nitrogen (Horwood, Chichester, 1981), pp. 285–287.

Standard Methods for Examination of Water and Waste Water (American Public Health Association, Washington, D.C., 1976), 14th ed.

Chaube

Baveja

A. K.

and Gupta

V. K

, Anal. Chim. Acta 143, 273 (1982).

Sunita

and Gupta

V. K

, Int. J. Environ. Anal. Chem. 19, 11 (1984).

Bashir

W. A.

and Flamerz

, Talanta 28, 697 (1981).

Dasgupta

P. K.

, Anal. Lett. 17(A10), 1005 (1984).

10.

Norwitz

and Kelliher

P. N

, Analyst 110, 689 (1985).

11.

Tarafder

P. K.

and Rathore

D. P. S

, Analyst 113, 1073 (1988).

12.

Rathore

H. P. S.

and Tiwari

S. K

, Anal. Chim. Acta 242, 225 (1991).

13.

Shinn

M. B.

, Ind. Eng. Chem. Anal. Ed. 13, 33 (1941).

14.

Gine

M. F.

Bergamin

Zagatto

F.E. A.

and Reis

B. F

, Anal. Chim. Acta 114, 191 (1980).

15.

Zagatto

E. A. G.

Jacintho

A. O.

Mortatti

and Bergamin

H.F

, Anal. Chim. Acta 120, 399 (1980).

16.

Anderson

, Anal. Chim. Acta 110, 123 (1980).

17.

van Staden

J. F.

, Anal. Chim. Acta 130, 403 (1982).

18.

Canete

Rios

Luque de Castro

M. D.

and Valcarcel

, Analyst 113, 739 (1988).

19.

Jackson

P. E.

Haddad

P. R.

and Dilli

, J. Chromatrogr. 295, 471 (1984).

20.

Hunt

and Seymour

D. J

, Anal. Chem. 54, 2601 (1985).

21.

Schroeder

D. C.

, J. Chromatrogr. Sci. 25, 405 (1987).

22.

W. S.

and Saschenbrecker

P. W

, J. Assoc. Off. Anal. Chem. 60, 1137 (1977).

23.

Tanaka

Nose

and Watanabe

, J. Chromatrogr. 194, 21 (1980).

24.

Tanaka

Nose

and Iwasaki

, J. Chromatrogr. 235, 173 (1982).

25.

H. L.

Chen

S. H.

Fanazo

Tanaka

and Shono

, J. Chromatrogr. 291, 409 (1984).

26.

Doerr

R. C.

Fox

J. B.

Lakritz

and Fiddler

, Anal. Chem. 53, 381 (1981).

27.

Doerr

R. C.

Gates

R. A.

and Fiddler

, J. Assoc. Off. Anal. Chem. 65, 616 (1982).

28.

Fiddler

Doerr

R. C.

Gates

R. A.

and Fox

J. B

, J. Assoc. Off. Anal. Chem. 67, 525 (1984).

29.

Private communications.

30.

Irish

D. E.

and Chen

, Appl. Spectrosc. 25, 1 (1971).

31.

Lombardi

D. R.

Wang

Sun

Fountain

A. W.

III Vickers

T. J.

Mann

C. K.

Reich

F. R.

Gouglas

J. D.

Crawford

B. A.

and Kohlasch

F. L

, Appl. Spectrosc. 48, 875 (1994).

32.

Nakamato

, Infrared and Raman Spectra of Inorganic and Co-ordination Compounds (John Wiley and Sons, New York, 1986), 4th ed.

Kinetic Study of the Decomposition of Nitrite to Nitrate in Acid Samples Using Raman Spectroscopy

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