in the AOAC 2007.01 version [6,15,18]. As an amine with pKaof 4.06,pym terjemahan - in the AOAC 2007.01 version [6,15,18]. As an amine with pKaof 4.06,pym Bahasa Indonesia Bagaimana mengatakan

in the AOAC 2007.01 version [6,15,1

in the AOAC 2007.01 version [6,15,18]. As an amine with pKaof 4.06,
pymetrozine is appreciably ionic at low pH, and lower partitioning into the MeCN phase is expected vs. decreasing pH. However,
this trend was not observed as expected, and later experiments
indicated that the particular sorbents/lots used in d-SPE were at
least partially responsible [21]. In any case, the buffered versions
using ammonium salts provided high quality results for the great
majority of pesticides. Either NH4O2CH or NH4OAc versions led to
similar analytical performance, and we chose NH4O2CH due to its
more common use in LC-MS methods. Moreover, thifensulfuronmethyl (a sulfonyl urea herbicide) gave appreciably higher recovery
using the formate-buffered version than for acetate, and much
higher than results compared to the unbuffered experiment using
NH4Cl
0/5000
Dari: -
Ke: -
Hasil (Bahasa Indonesia) 1: [Salinan]
Disalin!
dalam versi AOAC 2007.01 [6,15,18]. Sebagai amina dengan pKaof 4,06,pymetrozine lumayan ionik pada pH rendah, dan rendah partisi ke dalam fasa MeCN diharapkan vs penurunan pH. Namun,tren ini tidak dirayakan sebagai percobaan yang diharapkan, dan kemudianmenunjukkan bahwa sorbents/lots tertentu yang digunakan dalam d-SPE disetidaknya sebagian bertanggung jawab [21]. Dalam setiap kasus, versi bufferedmenggunakan garam amonium memberikan hasil dengan kualitas tinggi untuk Agungsebagian besar pestisida. Versi NH4O2CH atau NH4OAc yang menyebabkankinerja analitis yang sama, dan kami memilih NH4O2CH karena yanglebih umum digunakan dalam metode LC-MS. Selain itu, thifensulfuronmethyl (sulfonyl urea herbisida) memberikan lumayan tinggi pemulihanmenggunakan versi formate buffered daripada untuk asetat, dan banyaklebih tinggi dari hasil dibandingkan dengan menggunakan unbuffered percobaanNH4Cl
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