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Appendix 2 CONVERSION FACTORS 1. From gas in gas to ppm by volume, at 25°C and 760 mmHg: «£ x m3 m3 (molecular wt) mol of air % by volume x W4 - 2. From gas, liquid, or solid in liquid to ppm by weight: x molecular wt x 103 - ^ L L 3. From amount received by inhalation to amount ingested: â* x volume of inspired in air m3 x % retention/100 - mg m3 777
772 GUIDELINES FOR DEVELOPING SMACS 4. From concentration in diet to ingested dose: ppb in diet x 103 - ppm in diet ppm in diet - mgjkg in diet - \igfg in diet mg/kgdietx : - mglkgfday body weight, kg 5. From percent to concentration: H*/to% = Iff2 kg/kg vol/vol% = 1(T2L/L wt/vol% = l<r2kg/L g% =g/100 ml
