Table 3 Tolerable concentration level of interferents with respect to NLX

Na⁺, K⁺, Mg²⁺, Cl⁻, NO₃ ⁻, NH₄ ⁺, EDTA and SO₄ ²⁻

4.8×10⁻⁵

Glucose, sucrose, lactose, talc, starch, magnesium stearate, citric acid

9.2×10⁻⁶

Uric acid, ascorbic acid and urea

5.6×10⁻²

Adrenaline, dopamine, cysteine, histamine, tyrosine, glucosamine

8.4×10⁻⁵

Al³⁺, Cd²⁺, Co²⁺, Fe²⁺, Fe³⁺, Mn²⁺, Ni²⁺, and Cu²⁺

2.6×10⁻¹

Nalbuphine hydrochloride and naltroxone hydrochloride

1.5×10⁻¹