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This article in CS

  1. Vol. 7 No. 3, p. 267-268
    Received: Dec 3, 1966

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Revised Method for the Preparation of Standards in the Sodium Picrate Assay of HCN1

  1. D. G. Gilchrist,
  2. W. E. Lueschen and
  3. C. N. Hittle2



The proposed revised sodium picrate assay method relies on recovery rather than solution standards. The recovery standards are prepared by releasing HCN from stock cyanide solutions, recovering the HCN on alkaline picrate paper strips, followed by elution in distilled H2O.

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