endosulfan (500 mg L− 1), which was solubilized in ethyl acetate; the solutions were kept under refrigeration.
The method used to quantify the compounds was external standard- ization. For the construction of analytical curves, dilutions of an inter- mediate solution were performed in ultrapure water, containing a
mixture of all standards at the same concentration (1.0 mg L− 1), and this mixture was obtained by diluting the previously prepared stock solutions in methanol.
Before the SDME procedure, the samples suffered no prior treat- ment, except for slightly sparkling wine samples, which were subjected
endosulfan (500 mg L− 1), which was solubilized in ethyl acetate; the solutions were kept under refrigeration.The method used to quantify the compounds was external standard- ization. For the construction of analytical curves, dilutions of an inter- mediate solution were performed in ultrapure water, containing amixture of all standards at the same concentration (1.0 mg L− 1), and this mixture was obtained by diluting the previously prepared stock solutions in methanol.Before the SDME procedure, the samples suffered no prior treat- ment, except for slightly sparkling wine samples, which were subjected
การแปล กรุณารอสักครู่..