Flow-injection determination of acetone with diazotized anthranilic acid through a fluorescent reaction intermediate

Acetone and diazotized anthranilic acid react in alkaline solution, giving a fluorescent intermediate that can be measured at excitation and emission wavelengths of 305 and 395 nm, respectively. Based on this, a fluorimetric flow-injection method is proposed for the determination of acetone in aqueous solution. Under the proposed conditions, acetone can be detected at concentrations higher than 8 × 10−7 M, with a linear application range from 1 × 10−6 to 2 × 10−4 M and an R.S.D. of 2.7% (1.0 × 10−5 M, n = 10). A sampling frequency of 24 h−1 is achieved. Some potentially interfering species are investigated.