| Parameter | Specification | Result | Conforms | |-----------|---------------|--------|----------| | Assay (HCl) | 36.5 – 37.5% | 37.2% | Yes | | Appearance | Clear, colorless | Pass | Yes | | Heavy metals (Pb) | ≤1 ppm | <0.5 ppm | Yes | | Bromide (Br⁻) | ≤0.01% | 0.005% | Yes | | Free chlorine | ≤0.0001% | <0.0001% | Yes |
: The instrumentation used, such as HPLC, GC-MS, or NMR , to confirm the results. Why the COA Matters for Your Lab uni-chem chemical reagents certificate of analysis
If an online search tool does not yield results for your specific batch, use the following methods: | Parameter | Specification | Result | Conforms
Elias looked at the numbers. They were true. The 'Assay' was real. The 'Heavy Metals' were real. The invisible lead was gone, exorcised by a second glance and a fresh bottle. The 'Assay' was real
| Parameter | Specification | Result | Method | | :--- | :--- | :--- | :--- | | Appearance | Clear, colorless liquid | Conforms | Visual | | Assay (GC) | ≥ 99.9% | 99.93% | GC-FID | | Water (KF) | ≤ 0.02% | 0.009% | Karl Fischer | | UV Absorbance (254 nm) | ≤ 0.010 AU | 0.007 AU | UV Spectro | | Residue after Evaporation | ≤ 2.0 mg/L | < 1.0 mg/L | Gravimetric |