Annual Variation in the Concentration Levels and Frequency of Detection of Pesticides in Water Sources in Hyogo Prefecture

Development of a Simultaneous Analysis Method for Carbofuran and Its Three Derivative Pesticides in Water by GC/MS with Temperature Programmable Inlet On-column Injection

“…In addition to the favorable results obtained using the TPI on-column method to analyze thermally unstable pesticides, such as trichlorfon and methyl dymron, 16 these present results revealed that this method was also effective for the simultaneous analysis of carbofuran and its derivatives.…”

“…[1][2][3][4][5][6] In order to investigate pesticide contamination in water at an early stage, a sensitive and accurate analytical method is required. Carbofuran, a carbamate pesticide that is included in four pesticides (carbofuran, bentazone, 2,4-D, triclopyr), have recently been added to the list of surveillance items under the Water Supply Law set by the Ministry of Health and Welfare on June 29, 1999.…”

“…[13][14][15] The author of this paper has, however, previously succeeded in analyzing thermally unstable trichlorfon and methyl dymron using GC/MS by temperature programmable inlet (TPI) oncolumn injection. 16 Using this method, it is possible to obtain a mass spectrum with a specificity higher than the fluorescence spectrum obtained by the fluorescence detection method. In addition, although the LC/MS analysis of carbamate pesticides showed high sensitivity, as previously reported, variations were observed in the ion signal intensities due to various adduct ions generated under the influence of a matrix.…”

Simultaneous Analysis of Carbamate Pesticides in Tap and Raw Water by LC/ESI/MS

“…All of the ions showed peaks of the same retention time as that of the carbofuran standard solution. Moreover, when simultaneously analyzed by the GC/MS which we developed, 18 it was confirmed that the ions corresponded to carbofuran. Currently, carbendazim and carbofuran are not approved for use as pesticides in Japan.…”

Fluorescence Determination of the Pesticide Asulam by Flow Injection Analysis

“…The vast majority of methods have been separation procedures, such as chromatographic, electrophoresis or a combination of both, and have been provided with spectrophotometric detection (most of the reported methods), fluorometric or electrochemical. Into the chromatographic field can be found many articles concerning thin layer 4,5 as gas chromatography 6 or a relatively large number of procedures concerning liquid chromatography [7][8][9][10][11][12] on certain occasions coupled with solid-phase extraction. [13][14][15][16] Capillary electrophoresis has been applied to Asulam determination by simultaneous spectrophotometric and electrochemical detection.…”