dek W7/ 
Glycollate acid and iodine. 
vr nne eer een ene ene reen ma SSR EE STI Do ee 
Quality of light Time of | Amount of | Unchanged | 
exposure iodine added iodine Volume of Solution 
1) Sunlight | 250" | 0.00635 0.00415 isde a A glycollic acid and 
Darkness | 250° © ~~ =Do | 0.00542 |45 c.c. x iodine. 
2) Sunlight 420' | Do | 0.00224 | 5 
Darkness 420’ Do 0.00352 || is 
3) Diffused light 480’ Do 0.00217 | on 
Darkness 480' Do 0.00275 { 
4) Diffused light 560' Do | 0.00185 | ne 
Darkness 560! Do 0.00232 | 
From the foregoing tables it will be seen that the action of iodine 
is more rapid with the salts than with the acids. Hence it may be 
inferred that iodine acts on the negative organic radicals (i.e. formate 
ion, malate ion, etc.). Moreover the “Reciprocity Law” holds good 
Concentration of nitrite solution 2N (0.991 factor). 
‘EE 
ES | rer 
Quality of tight | Time of | Amount of | Unchanged | —Vojume of solution 
| exposure iodine added iodine 
Dyounhent 30! 0.0635 0.00128 50 c.c. Sodium nitrite and 
| IN DAN 
‚03469 |)5 cc. iodine. 
Darkness 30’ 0.0635 0 | 10 
2) Sunlight 125’ | 0.1270 0.00642 | 50 c.c. Sodium nitrite and 
| Nae 
Darkness | 125’ | 0.1270 0.06832} 10 c.c. 55 iodine. 
3) Sunlight 280’ „01905 | 0.01135 | 50 cc. Sodium nitrite and 
| | | | { ING Ys 
Darkness | 280’ \_0.1905 | 0.09985 | | 15 cc, +5 iodine. 
4) Sunlicht | 25° | 0.03407 | 0.00054 | ice. Sodiimmitriteand 
| | | mk 
Darkness 25’ | 0.03407 0.01854 ZO GG, 100 iodine. 
5) Diffused light, 100’ | Do 0.00663 | 
| | | Do 
Darkness | 100° | Do 0.01235 || 
6) Diffused light 180° | 0.0635 0.01101 ie cc. Sodium nitrite and 
Darkness | 180’ | 0.0635 0.02195 |\5 cc. 9 iodine. 
7) Diffused light | | 244’ 0.1270 0.02403 50 c.c. podium nitrite and 
| | 
Darkness | 244’ 0.1270 | 0.04785 10% cer ty iodine. 
