Which of the following methods results in the formation of yellow coloured compound?
A. Griess-Saltzman method
B. Phenoldisul phonoic acid method
C. Chemiluminescence method
D. West-Gaeke method
Answer:B
Which of the following methods results in the formation of yellow coloured compound?
A. Griess-Saltzman method B. Phenoldisul phonoic acid method C. Chemiluminescence method D. West-Gaeke method
Explanation: Phenoldisul phonoic acid method results in the formation of yellow coloured compound. The intensity of the colour is measured to determine the concentration of NOx.