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The product with appearance and fluidity dependent on the oligomerization degree, weighed with analytical precision (m3) contains the free polyethyleneglycols (PEGn) in the analyzed product: polyethyleneglycols (PEG n ) = m 3 m 2 ⋅ 100.
10 15 g polyethoxylated nonylphenol (n = 3-20), technical product, weighed with analytical precision in a previously tared 50 100 mL beaker, are introduced in a vacuum-connected (10-3-10-4 mm Hg) phosphoruspentoxidentoxidesiccatorator, kept at room temperature under the specified conditions until constant weight measured on an analytical balance.
1 2 g dried polyethoxylated (n = 3-20) and free nonylphenol, weighed with analytical precision in a previously tared 50 100 mL beaker, are dissolved in 5 10 mL ethyl acetate, neat, or with a minimal addition of saturated NaCl solution, then transferred quantitatively (by repeated washings with minimal amounts of solvent) into a 250-mL separation funnel.
The product resulted after the high-vacuum (10 2-10 3 mm Hg) evaporation of the reunited ether phases with appearance and fluidity dependent on the oligomerization degree, weighed with analytical precision (m5) contains the free nonylphenol ROH (R = NF), in the dried technical product analyzed, free of polyethyleneglycols: free nonylphenol R(NH OH = m 5 m 3 ⋅ 100.
The product with appearance and fluidity dependent on the oligomerization degree, weighed with analytical precision (m4) contains the mixture of polyethoxylated (n = 3-20) and free nonylphenol, and polyethylene glycol from the dried product accessed: polyethoxylated (n=3-20) nonylphenol = m 2 − m 4 m 2 ⋅ 100.
1 2 g analyzed mixture weighed with analytical precision in a previously tared 50 100 mL beaker, is dissolved in 5 10 mL 96% ethyl alcohol, then transferred quantitatively (by repeated washings with minimal amounts of solvent) into a 250-mL separation funnel.
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