. 2020 Dec 8;9:e62334. doi: 10.7554/eLife.62334

Table 1. LOD calculated according to IUPAC (International Union of Pure and Applied Chemistry) guideline as derived from 12 blank measurements for phosphorus, sulfur, potassium and zinc, expressed in ng.mm⁻², and expressed in g (and number of atoms) within pixels of 40 nm x 40 nm size.

Table 1—source data 1. LOD calculation data.

	Phosphorus	Sulfur	Potassium	Zinc
LOD	0.513 ng.mm⁻²	0.138 ng.mm⁻²	0.152 ng.mm⁻²	0.009 ng.mm⁻²
LOD in 40 nm x 40 nm pixel	8.2 10⁻¹⁹ g (16,000 atoms)	2.2 10⁻¹⁹ g (4200 atoms)	2.4 10⁻¹⁹ g (3800 atoms)	1.4 10⁻²⁰ g (130 atoms)

Table 1. LOD calculated according to IUPAC (International Union of Pure and Applied Chemistry) guideline as derived from 12 blank measurements for phosphorus, sulfur, potassium and zinc, expressed in ng.mm−2, and expressed in g (and number of atoms) within pixels of 40 nm x 40 nm size.