Analytical control of adjuvants in herbicide formulations by NIR spectroscopy

被引:5
作者
Blanco, Marcelo [1 ]
Zamora, David [1 ]
Planells, Joaquim [1 ]
Mulero, Rufi [2 ]
机构
[1] Univ Autonoma Barcelona, Fac Sci, Dept Chem, E-08193 Barcelona, Spain
[2] CRODA SA, Dev & Qual Assurance Dept, Barcelona 08495, Spain
关键词
Emulsions; Surfactants; Near-infrared spectroscopy; Multivariate calibration; NEAR-INFRARED SPECTROSCOPY; CUTICULAR PENETRATION; QUALITY;
D O I
10.1007/s00216-009-3021-4
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Herbicide preparations, which typically consist of an active compound and an adjuvant, are formulated in such a way as to facilitate rapid dispersion of the pesticide and its transfer across the fat cuticle of plant leaves. The adjuvant usually comprises various substances including an oil, water, and one or more emulsifiers for increased stability. The difficulty of analyzing these mixtures has severely restricted the ability to control herbicide preparations, which must usually be characterized in terms of global, non-specific parameters such as the acid, saponification, and hydroxyl values. Near-infrared spectroscopy is an expeditious analytical technique requiring no sample preparation and affording multi-determinations in complex mixtures. In this work, we used laboratory-made samples to construct PLS multivariate models for determining the components of the adjuvant mixture in a herbicide preparation. The best ensuing model was validated and used to analyze industrial preparations with good results.
引用
收藏
页码:839 / 844
页数:6
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