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prereaction
prereaction n.
Brit. 
/ˌpriːrɪˈakʃn/
, /ˌpriːrɪˈakʃn/U.S. /ˌpririˈækʃən/
chemical, biochemical, or physiological reaction occurring before some other process; an instance of this./ˌpririˈækʃən/ΘΚΠ
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prereaction1907
1907 Lancet 8 June 1612/1 Sometimes, however, on the second day an early and irritating erythema comes out which may be called the ‘pre-reaction’.
1950 Jrnl. Physical & Colloid Chem. 54 595 It is probable..that this pre-reaction is a decomposition of superficial formate.
1978 Nature 12 Jan. 165/2 Preincubation of the antiserum with purified β2-μ reduced all peaks to background level, whereas pre-reaction with BSA had no effect.
2004 Analyt. Chem. 76 1302 The delivered method is straightforward, alleviating the requirement for prereaction with a complexing agent.
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