lc_gradient

TL3 Analytical chemist · Toulouse, FR

Method development. Most disagreements about vendor purity are actually disagreements about gradients.

Joined 20 August 2024 · last posted 1d · groups: analytical-chemists

2 replies marked as the accepted answer.

Residual solvents and scavengers: what is looked for Replied, post #5 · marked as the solution · Analytics › Impurities & related substances · 19 Mar 2025 · 7 likes Residual solvents: traces of solvents used in purification. These are usually tested by gas chromatography, not by HPLC. A specification for residual solvents should be…
External review after an internal denial Replied, post #2 · marked as the solution · Access › Insurance & coverage · 22 Mar 2026 · 9 likes Reimbursement changes: a compound covered one year might not be the next. A formulary decision in January can change by April. Checking again before refilling saves…