Sample : 10 μL
1. Li⁺ 2 mg/L
2. Na⁺ 10 mg/L
3. NH₄⁺ 10 mg/L
4. Methylamine 10 mg/L
5. K⁺ 20 mg/L
6. Trimethylamine, TMA 20 mg/L
7. Triethylamine, TEA 20 mg/L
8. Mg²⁺ 10 mg/L
9. Ca²⁺ 20 mg/L