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Isolation of chlorophenoxy herbicides on columns of glass beads

, : Isolation of chlorophenoxy herbicides on columns of glass beads. Journal of Association of Official Analytical Chemists 60(6): 1324-1327

A method for the analysis of chlorophenoxy herbicide residues was developed based on the observed adsorptive affinity of chlorophenoxy acids for glass surfaces. Extracted residues of 2,4-D and 2,4,5-T were adsorbed onto a column of fine mesh glass beads, and subsequently esterified with diazomethane for GLC quantitation, using an electron capture detector. Prior to injection, the esterified sample is cleaned up by passing through a Florisil column.


Other references

Matsushita, K.; Ishikawa, T.; Sumita, S.; Kobayashi, T.; Ogawa, H.; Inoue, N.; Matsumoto, K.; Taima, M.; Nakazawa, I.; Sugano, T.; Ishigami, T.; Uchino, K.; Umemura, S., 2006: Daily shock impedance measured by implantable cardioverter defibrillator is useful in the management of congestive heart failure. Background Clinical data suggest that changes in intrathoracic impedance and fluid accumulation in the lung are inversely related.Methods and Results Daily shock impedance (S-IMP) was evaluated in 29 patients in whom a Ventak Prizm 2 was implanted...

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Nasyrov Y.S., 1979: Physiological and genetic bases of increasing the yield of agricultural crops. The improvement of the photosynthetic system activity by genetic selection is described. The conception of a bi-unitive nuclear-plastid genetic control of photosynthesis is presented. The importance of photorespiration and the differences of vario...

Akoudad, H.; E.K.orb, N.; Sekkali, N.; Mechrafi, A.; Zakari, N.; Ouaha, L.; Lahlou, I., 2016: Acute myocardial infarction in Morocco: FES-AMI registry data. Acute myocardial infarction is the most dangerous complication of coronary atherothrombosis. There are several disparities in regard to its management around the world. The aim of this study is to analyze the specificities of management of acute m...