
Quis KAF

Quiz
•
Chemistry
•
University
•
Medium
Mariyani Badaruddin
Used 5+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Komponen utama sistem HPLC yang berfungsi untuk memompa fase gerak disebut:
Kolom
Pompa
Detektor
Injektor
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Dalam sistem HPLC, apa fungsi utama dari injektor?
Mendeteksi senyawa yang dipisahkan
mengalirkan fase gerak ke kolom
Memasukkan sampel ke dalam sistem secara tepat dan reproducible
Memisahkan senyawa berdasarkan polaritasnya
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Jenis detektor HPLC apa yang paling umum digunakan untuk analisis senyawa organik?
Detektor fluoresensi
Detektor refraksi
Detektor UV-Vis
Detektor konduktivitas
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Dalam HPLC fase terbalik (reversed phase), fase diam biasanya bersifat:
Polar
Non-polar
Ionic
Amfoter
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Jika suatu senyawa memiliki waktu retensi yang terlalu lama, tindakan apa yang dapat diambil?
Turunkan suhu kolom
Kurangi laju aliran
Naikkan polaritas fase gerak
Turunkan volume injeksi
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Apa fungsi pelarut dalam kromatografi lapisan tipis?
Fase diam
Fase gerak
Detektor
Reagen semprot
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Nilai Rf (faktor retardasi) dihitung menggunakan rumus:
Jarak pelarut / jarak sampel
Jarak dari titik awal ke noda / jarak pelarut
Jarak kolom / waktu elusi
Waktu retensi / waktu pelarut
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