Analysis Notes
One bottle, two verdicts: lead limits by vintag...
A wine that complies in Great Britain fails in Northern Ireland — same bottle, same number, a different rulebook. This article sets out the lead limits for wine, beer and...
One bottle, two verdicts: lead limits by vintag...
A wine that complies in Great Britain fails in Northern Ireland — same bottle, same number, a different rulebook. This article sets out the lead limits for wine, beer and...
EU maximum levels for heavy metals: supplements...
Regulation (EU) 2023/915 sets the maximum levels for heavy metals in food. This article lists the levels for supplements, spices, wine and juice, shows where the regulation sets no level...
EU maximum levels for heavy metals: supplements...
Regulation (EU) 2023/915 sets the maximum levels for heavy metals in food. This article lists the levels for supplements, spices, wine and juice, shows where the regulation sets no level...
Reading 2D NMR: COSY, HSQC and HMBC by NorrChemica
A 2D NMR spectrum spreads the signals over two axes, and its peaks become correlations — which protons couple, each proton on its carbon, and the long-range links across the...
Reading 2D NMR: COSY, HSQC and HMBC by NorrChemica
A 2D NMR spectrum spreads the signals over two axes, and its peaks become correlations — which protons couple, each proton on its carbon, and the long-range links across the...
Beyond ¹H and ¹³C: Reading Fluorine, Phosphorus...
Past ¹H and ¹³C: when a molecule carries fluorine, phosphorus or boron, one ¹⁹F, ³¹P or ¹¹B spectrum reads that element directly — the species present, their coordination, the oxidation...
Beyond ¹H and ¹³C: Reading Fluorine, Phosphorus...
Past ¹H and ¹³C: when a molecule carries fluorine, phosphorus or boron, one ¹⁹F, ³¹P or ¹¹B spectrum reads that element directly — the species present, their coordination, the oxidation...
Reading ¹H and ¹³C NMR — A working chemist's gu...
A practical guide to reading ¹H and ¹³C NMR — chemical shift, integration, coupling constants, the ¹³C carbon-count check, and quantitative NMR — for chemists comfortable at the bench but...
Reading ¹H and ¹³C NMR — A working chemist's gu...
A practical guide to reading ¹H and ¹³C NMR — chemical shift, integration, coupling constants, the ¹³C carbon-count check, and quantitative NMR — for chemists comfortable at the bench but...