A Rapid Extractive Spectrophotometric Method for the Determination of Tin with 6-Chloro-3-hydroxy-2-(2′-thienyl)-4-oxo-4H-1-benzopyran

Table 3

Tolerance limit of different ions in the determination of 10 μg of Sn(II).

Ions	Tolerance limit
	(concentration mg/10 mL)
Thiourea, sulphite, ascorbic acid, and iodide	100.0
Sulphate, nitrate	80.0
Bromide, sulfosalicylic acid	75.0
Chloride, tartrate	50.0
Acetate	40.0
Carbonate, citrate	20.0
Thiocyanate	10.0
Phosphate	7.0
Dithionite	5.0
Oxalate	4.0
EDTA “disodium salt”	2.0
Glycerol	1.0^a
H2O2 (30%, m/v)	0.5^a
Zn(II), Pb(II), and Se(II)	10.0
Cd(II)	8.0
Ba(II), Ni(II), Co(II), and Hg(II)	5.0
Be(II), Ce(IV), As(II), Mg(II) Mn(II), Sr(II), Al(III), and Os(VIII)	3.0
Ag(I), Cu(II)	2.0
U(VI)	1.0
Ta(V)	0.7
Cr(VI)	0.5
Th(IV)	0.3
Ru(III), Ir(III)	0.1

^aValue given in mL.