Table 3.

Interference thresholds for different spectroscopic methods for oxalate determination.

Interfering Compound	Interference Threshold, mg/L	Reference
Chloride	3.5 × 103	[10]
	3.0 × 101	[21]
	1.8 × 104	[22]
	7.1 × 101	[23]
	4.0 × 103	Present work
Phosphate	5.0	[20]
	6.0 × 10−2	[21]
	4.8 × 102	[22]
	1.2 × 104	Present work
Nitrate	2.8 × 102	[20]
	6.0 × 101	[21]
	9.3 × 103	[22]
	6.2 × 101	[23]
	1.1 × 104	Present work
Sulfate	2.0 × 101	[20]
	6.0	[21]
	4.8 × 102 (in presence of BaCl2)	[22]
	7.6 × 101	[23]
	2.0 × 103	Present work
Citric acid	4.8 × 103	[10]
	4.0	[20]
	6.0 × 10−2	[21]
	1.0 × 104	Present work
Ascorbic acid	0.2	[10]
	6.0	[21]
	2.0 × 102	Present work
Tartaric acid	7.5 × 104	[10]
	3.0 × 10−2	[21]
	2.0 × 102	Present work
Gallic acid	0.6 × 102	Present work
Sucrose	8.6 × 104	[10]
	2.0 × 103	Present work