Thionine-Bromate as a New Reaction System for Kinetic Spectrophotometric Determination of Hydrazine in Cooling Tower Water Samples

Table 1

Tolerance limit for various species for the determination of 1.0 𝜇g mL⁻¹ of hydrazine.

Foreign species	Tolerance limit; (𝑤species/𝑤hydrazine)
EDTA, sulfamic acid	1000
Li^+, Na^+, K^+, Ca^2+, Mg^2+	1000
NO3^−, SO4^2−, PO4^3−, CH3CO2^−, CO3^2−, HCO3^−	1000
^aFe^3+, Cr^3+, Zn^2+	950
^bNO2^−	760
^aFe^2+	600
Cl^−	50

aAfter adding 3 mL of 5% EDTA.
bAfter adding 3 mL of 3% sulfamic acid.