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12. XXIV.―Toughened filter-papers.
13. The paper-chromatographic separation and determination of chlorinated insecticide residues.
14. A field method for the rapid determination of hydrogen cyanide in air.
15. Determination of serum-protein fractions by zone electrophoresis on paper and direct reflection photometry.
16. The identification and determination of the lower straight-chain fatty acids by paper partition chromatography.
17. Some applications of a modified technique in paper chromatography.
18. Partition chromatography on paper with special reference to quantitative separations.
19. A bathocuproine reagent-paper for the rapid semi-quantitative determination of copper in the 1 to 70 p.p.m. range.
20. A test-paper method for the determination of tolylene di-isocyanate vapour in air.
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