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waterstofchloride; oleum (rokend zwavelzuur); difosforpentaoxide (fosforzuuranhydride); andere anorganische zuren; silicium en zwaveldioxide
hydrogen chloride; oleum; diphosphorus pentaoxide; other inorganic acids; silicon and sulphur dioxide
interne standaard: α-methyltryptofaan (zuiverheid/gehalte ≥ 99 %), gedroogd onder vacuüm boven difosforpentaoxide.
internal standard substance: α-methyl-tryptophan (purity/content ≥ 99 %), dried under vacuum over phosphorous pentoxide.
mengsels die hoofdzakelijk bestaan uit (5-ethyl-2-methyl-2-oxido-1,3,2 dioxafosfinaan-5-yl)methyl-methyl-methylfosfonaat en bis[(5-ethyl-2 methyl-2-oxido-1,3,2-dioxafosfinaan-5-yl)methyl]methylfosfonaat, en mengsels die hoofdzakelijk bestaan uit dimethylmethylfosfonaat, oxiraan en difosforpentaoxide
mixtures consisting mainly of (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate, and mixtures consisting mainly of dimethyl methylphosphonate, oxirane and diphosphorus pentaoxide