Development of Flow Injection Spectrophotometric Method for 1-Napthylthiourea Using Sodium Nitrite and Sulphanilic Acid Diazotization Reaction

Table 1

Effect of physical variables on the determination of ANTU ().

Physical variables	Range studied	Optimum
Flow rate (mL/min)	0.2–1.2	0.5
Sample injection volume (µL)	60–360	300
Reaction coil-I length (cm)	0–300	200
Reaction coil-II length (cm)	0–300	150
Reaction coil-I and -II temperature (°C)	10–50	30