METODA PO GREEN-U Princip metode: nitriti reaguju sa Griess ...
METODA PO GREEN-U Princip metode: nitriti reaguju sa Griess ...
METODA PO GREEN-U Princip metode: nitriti reaguju sa Griess ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>METODA</strong> <strong>PO</strong> <strong>GREEN</strong>-U<br />
<strong>Princip</strong> <strong>metode</strong>: <strong>nitriti</strong> <strong>reaguju</strong> <strong>sa</strong> <strong>Griess</strong>-ovim reagensom, pri čemu se dobija ljubičasta azo boja.<br />
Intenzitet boje zavisi od koncentracije nitrita. Ovom metodom se mogu određivati i nitrati.<br />
GRIESS-OV REAGENS<br />
• sulfanilamid (SA) Mw=172.2<br />
1g / 100ml 5% H3<strong>PO</strong>4<br />
• naftaletilendiamin (NEDA) Mw=259.2<br />
0.1g / 100ml dH2O<br />
Rastvore spojiti u razmeri 1:1 i mešati na magnetnoj mešalici u mraku na 4°C – 30 minuta.
STANDARDNA KRIVA<br />
• standard NaNO2 Mw=69<br />
0.138g / 10ml dH2O 200mM<br />
1000xR ↪ 10µl + 9.99ml dH2O 2 x 100µM<br />
1ml STD (2 x 100µM ) + 1 ml M199 100 µM<br />
2xR↪1ml STD + 1 ml M199 50 µM<br />
2xR↪1ml STD + 1 ml M199 25 µM<br />
2xR↪1ml STD + 1 ml M199 12.5 µM<br />
2xR↪1ml STD + 1 ml M199 6.25 µM<br />
2xR↪1ml STD + 1 ml M199 3.125 µM<br />
2xR↪1ml STD + 1 ml M199 1.56 µM
2xR↪1ml STD + 1 ml M199 0.78 µM<br />
2xR↪1ml STD + 1 ml M199 0.39 µM<br />
2xR↪1ml STD + 1 ml M199 0.195 µM<br />
SLEPA PROBA: 100µl M199 + 100µl <strong>Griess</strong>-a<br />
UZORCI: 100µl uzorka + 100µl <strong>Griess</strong>-a<br />
STANDARDI: 100µl standarda + 100µl <strong>Griess</strong>-a<br />
INKUBACIJA: 10 minuta na sobnoj temperaturi<br />
MERENJE APSORBANCE NA FOTOMETRU: λ= 546nm<br />
REDOSLED DODAVANJA U MIKROTITAR PLOČU<br />
• Oznaka well-a Šta dodajemo???<br />
• 2A (slepa proba) 100µl M199 + 100µl <strong>Griess</strong> reagen<strong>sa</strong><br />
• 3A,4A 100µl M199 + 100µl <strong>Griess</strong><br />
• 5A,6A 100µl (STD 0,195 µM) + 100µl <strong>Griess</strong><br />
• 7A,8A 100µl (STD 0,39 µM) + 100µl <strong>Griess</strong>
• 9A,10A 100µl (STD 0,78 µM) + 100µl <strong>Griess</strong><br />
• 11A,12A 100µl (STD 1,56 µM) + 100µl <strong>Griess</strong><br />
• 1B,2B 100µl (STD 3,125 µM) + 100µl <strong>Griess</strong><br />
• 3B,4B 100µl (STD 6,25 µM) + 100µl <strong>Griess</strong><br />
• 5B,6B 100µl (STD 12,5 µM) + 100µl <strong>Griess</strong><br />
• 7B,8B 100µl (STD 25 µM) + 100µl <strong>Griess</strong><br />
• 9B,10B 100µl (STD 50 µM) + 100µl <strong>Griess</strong><br />
• 11B,12B 100µl (STD 100 µM) + 100µl <strong>Griess</strong><br />
• 1C,2C 100µl Uzorak 1 + 100µl <strong>Griess</strong><br />
• 3C,4C 100µl Uzorak 2 + 100µl <strong>Griess</strong>