Use of Tomato (Lycopersicon esculentum) Seedlings to Detect Bensulfuron and Quinclorac Residues in Water

Abstract

During 1990, injury to tomatoes grown on the narrow land between the Albufera Lake (Spain) and the Mediterranean Sea was attributed to use of irrigation water coming from adjacent rice fields containing bensulfuron and quinclorac. A tomato root bioassay was developed to detect the herbicides in 10 ml of water. The assay was more sensitive to bensulfuron (0.5 ng ml−1) than quinclorac (100 ng ml−1). Only 30 ml of the affected water are necessary to conduct the test. Albufera water, sampled at three sites during 1991 and one during 1992 in the irrigation network canals caused different tomato main root length responses.

Homogeneous time-resolved fluoroimmunoassay of bensulfuron-methyl by using terbium fluorescence energy transfer

“…The detection limit, defined as the concentration corresponding to twice the standard deviation of the background signal, is 2.10 ng ml − 1 . This value is similar to that of the general HPLC method [12][13][14]. Although the sensitivity is less than that of the heterogeneous TR-FIA method [11,15], the new method has the advantages of rapidity and simplicity since the solid-phase carrier and B/F Table 1 The influence of acceptor labeling ratio and different acceptor on the assay Concentration of BSM (ng ml …”

“…BSM has been measured with HPLC [12][13][14] and heterogeneous TR-FIA methods [11,15]. These methods give the detection limits at ng ml − 1 (HPLC) and 0.02-0.4 ng ml − 1 levels (TR-FIA).…”

Highly Sensitive Detection of Bensulfuron-methyl by Time-Resolved Fluoroimmunoassay Using a Tetradentate β-Diketonate Europium Chelate as a Label

“…The detection limit of the present method is 24 pg/ml (0.6 pg/assay), which is better by 1 -2 orders of magnitude than the limits of HPLC or of several other methods. [18][19][20] …”

“…1 to 2 orders of magnitude better than those of other conventional methods (~n ng/ml (ppb)) such as HPLC. [18][19][20] The dynamic range of the present method is up to ca. 100 ng/ml.…”

Potential Damage to Sensitive Landscape Plants from Wood Chips of Aminocyclopyrachlor Damaged Trees

“…Tomato was selected for this bioassay based on its sensitivity to growth regulator herbicides Busey et al 2003;Gomez De Barreda 1993). Tomato plants were grown from 15 cm tall seedlings that were transplanted into 15 cm diam pots (Hummert International, Earth City, MO 63045) filled with a Whitaker silt loam (fine-loamy, mixed, active, mesic Aeric Endoaqualf) with a pH of 6.8 and 3.1% organic matter.…”