Two recent reports from the National Bureau of Economic Research tackle versions of that question
Henningfield JE
We do not propose including picture warnings for cigarette papers due to the small size of the packaging

Our validation process is designed to meet regulatory standards to ensure that submitted data is reliable and defensible.HPHC Testing ServicesGroupInstrumentAnalytesAromatic AminesGC-MS (NCI) or GC-MS1-aminonaphthalene, 2,6-dimethylaniline, 2-aminonaphthalene, 4-aminobiphenyl, o-anisidine, o-toluidineCaffeic acidHPLC-UVcaffeic acidCarbonylsGC-MS (SIM)acetaldehyde, acetone, acrolein, crotonaldehyde, formaldehyde, methyl ethyl ketone, propionaldehyde,Nicotine degredation productsLC-MS/MSanabasine, nornicotineAromatic amines, heterocyclicLC-MS/MS2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), 2-amino-3-methyl-3H-imidazo[4,5-f]quinoline (IQ), 2-amino-3-methyl-9H-pyrido[2,3-b]indole (MeAC), 2-amino-6-methyldipyrido[1,2-a:3,2-d]imidazole (Glu-P-1), 2-amino-9H-pyrido[2,3-b]indole (AC), 2-aminopyrido[1,2-A:3,2-D]imidazole (Glu-P-2), 3-amino-1,4-dimethyl-5H-pyrido[4,3-b] indole (Trp-P-1), 3-amino-1-methyl-5H-pyrido[4,3-b] indole (Trp-P-2)Hydrogen cyanideCFAHCN impinger, HCN pad, total HCNMetals, mercuryCVAAmercuryHydrazineLC-MS/MShydrazineMetalsICP-MSarsenic, beryllium, cadmium, chromium, cobalt, lead, nickel, seleniumAmmoniaICAmmoniaPolynuclear aromaric hydrocarbons and aza-arenesGC-MS (SIM)5-methylchrysene, dibenz(a,e)pyrene, dibenz(a,h)pyrene, dibenz(a,i)pyrene, dibenz(a,l)pyrenePolynuclear aromaric hydrocarbonsGC-MS (SIM)benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(c)phenanthrene, benzo(j)aceanthrylene , benzo(k)fluoranthene, chrysene, cyclopenta(c,d)pyrene, dibenz(a,h)anthracene, indeno(1,2,3-cd)pyrene, naphthalenePhenolsHPLC-FLUcatechol, m-cresol, o-cresol, p-cresol, phenolRadionucleotidespolonium-210 (sub-contracted)Volatiles, semiGC-MS (SIM)acetamide, acrylamide, benzo(b)furan, nitrobenzene, quinoline, styreneVolatiles, semiGC-MS (TQU)ethyl carbamateNFDPM, nicotine and CONFDAM, nicotine, water, carbon monoxide, TPMNitrosamines, tobacco specificLC-MS/MS4-[methyl(nitroso)amino]-1-(3-pyridinyl)-1-butanone (NNK), N-nitrosonornicotine (NNN)Radionucleotidesuranium-235, uranium-238 (sub-contracted)Nitrosamenes, volatileLC-MS/MS1-nitrosopiperidine (NPIP), N-nitrosodiethanolamine (NDELA), N-nitrosodiethylamine (NDEA), N-nitroso-dimethylamine (NDMA), N-nitrosomorpholine (NMOR), N-nitroso-N-methylethylamine (NEMA), N-nitrosopyrrolidine (NPYR)VolatilesGC-MS (SIM)1,3-butadiene, acrylonitrile, benzene, ethylbenzene, ethylene oxide, furan, isoprene, nitromethane, propylene oxide, toluene, vinyl acetate, vinyl chlorideVolatilesGC-TEA2-nitropropane
