The phrase "according to established methods" is correct and usable in written English.
You can use it when you need to refer to a set of procedures or guidelines that have been previously established, e.g. "We followed all safety protocols according to established methods."
Motor neurons were differentiated from iPSCs and H9-hESCs (WiCell Research Institute and VIB-KU Leuven35), according to established methods with some modifications35.
NT-proBNP was determined from venous blood samples on patient admissions to the hospital with the use of a quantitative electrochemiluminescence assay on an Elecsys 2010 analyzer (Roche Diagnostics) according to established methods.
The moisture analysis was conducted according to established methods [16].
Samples were quantified in endpoint format, by counting positive wells according to established methods.
We performed the ICC analysis according to established methods [20], [34] [36].
Preparation of cRNA, hybridization, and scanning of microarrays was performed according to established methods [21], following the manufacturer's protocols (Affymetrix, Santa Clara, CA).
The SFI English version was culturally adapted and translated into Turkish using a double forward and backward method according to established guidelines.
According to the solubility in a series of solvents, grain albumins, globulins, gliadins and glutenins were extracted according to the established methods [ 65, 66].
Immunohistochemical staining was performed to identify expression of tissue-specific proteins in regenerated tissue according to previously established methods [ 40].
The cultivar was then point inoculated at the edge of the plate according to previously established methods (e.g., [39], [64]).
The total glutathione content, as well as the oxidized and reduced glutathione, were quantified according to well established methods [52], [53].
