Table 3.

Levels of nicotine and the tobacco specific nitrosamines (TSNAs), NNK, NAB, NAT and NNN in the pre-prepared and ready to buy Toombak samples. NNN and NNK were cumulatively compared in mg/kg with GothiaTek standard maximum limits allowed.

Type	Sample	Compound mg/g					GothiaTek standard NNN + NNK mg/kg = (0.95)
		Nicotine	NNK	NAB	NAT	NNN	NNN + NNK converted from mg/g to mg/kg in Toombak samples
Pre-prepared Toombak	S01	31	3.5	0.046	0.028	0.16	3660
Khartoum North Toombak	S02	22	1.8	0.012	0.006	0.07	1870
	S03	21	2.6	0.017	0.007	0.09	2690
	S04	22	1.9	0.014	0.006	0.08	1980
	S05	19	2.4	0.017	0.008	0.08	2480
	S06	25	1.5	0.014	0.006	0.08	1580
	S07	24	1.2	0.015	0.006	0.08	1280
	S08	19	1.2	0.011	0.005	0.07	1270
	S09	20	2.0	0.022	0.008	0.09	2090
	S10	22	2.3	0.021	0.011	0.10	2400
	S11	22	1.9	0.021	0.011	0.10	2000
Omdurman Toombak	S12	20	4.7	0.037	0.011	0.13	4830
	S13	20	2.9	0.024	0.011	0.10	3000
	S14	22	2.7	0.029	0.014	0.12	2820
	S15	19	3.0	0.022	0.008	0.10	3100
	S16	20	3.6	0.025	0.007	0.11	3710
	S17	20	2.4	0.021	0.007	0.11	2510
	S18	23	3.4	0.040	0.013	0.12	3520
	S19	22	1.9	0.015	0.007	0.08	1980
	S20	23	2.0	0.026	0.010	0.11	2110
	S21	16	1.4	0.010	0.005	0.06	1460
Total range		16−25 mg/g	1.2−4.7 mg/g	0.010 – 0.040 mg/g	0.005 – 0.014 mg/g	0.06 – 0.13 mg/g	1270 – 4830 mg/kg
	0.01	0.02	0.003	0.002	0.002