Detection limits of chemical spot tests toward certain carcinogens on metal, painted, and concrete surfaces

Spectrophotometric determination of amines with p-chloranil

“…However, as with p-chloranil, neither of these reagents can be used to determine tertiary amines, and neither are suited for determining amines in nonaqueous solvents. Both fluorescamine and o-phthalaldehyde were recommended along with Ehrlich's reagent (23) (p-dimethylaminobenzaldehyde), ethyl Ehrlich's reagent (24), p-dimethylaminocinnamaldehyde (23,25), and p-chloranil as possible reagents for detecting small amounts of primary amines on solid surfaces (26). In addition, H-acid (9-amino-1hydroxynaphthalene-3,6-disulfonic acid) and N-na (N-[lnaphthalenyl) -1,2-ethanediamine) are useful colorimetric reagents for determining a variety of primary and secondary amines (27).…”

“…Other workers have reported reactions between tertiary amines and p-chloranil in a variety of solvents (4-10). Some of these reports, as well as others (11)(12)(13)(14)(15)(16)(17)(18)(19) have shown that a number of primary and secondary, aliphatic and aromatic amines also react with p-chloranil. Again, a variety of solvents and reaction conditions were used in these studies.…”

Determination of trace quantitities of aromatic amines in dyestuffs

“…Other chromatographic and spectrophotometric methods have been published describing the determination of one or more of these aromatic amines in wastewater, air, urine, tissue, cigarette smoke, and food dyes (3)(4)(5)(6)(7)(8)(9)(10)(11)(12), Methods have been also described for the determination of benzidine and ßnaphthylamine in dyes by thin-layer chromatography (13,14) and for the determination of 4-dimethylaminoazobenzene in dyes by paper chromatography (15). To our knowledge, no publications have appeared on the simultaneous determination € 1977 American Chemical Society Migration Distance (cm) Figure 2.…”