| Analysis No. ……. | Sample Description ............……. |
| Starting time | Finishing time | |||||||
| of aspiration | of aspiration (calculate | |||||||
| = starting time + 15min) | ||||||||
| (hr. .min.) | (hr. .min.) | |||||||
| ……..-…….. | + | 15 min. | = | ……..-…….. |
| Initial | Interim | Final | Titre (T) | |||
| burette | burette | burette | ||||
| reading | reading | reading | ||||
| (if required) | (final - initial) | |||||
| (ml) | (ml) | (ml) | (ml) | |||
| ……….. | ……….. | ……….. | ……….. |
| SO2 (ppm) | = | Titre ........ (ml) | * | 16 | (see calculations) | |
| = | .......... ppm |
| Otherwise | ||||||||||
| X | = | Molarity of aprox. 0.01 M NaOH | = | | ............. | M | | ||||
| V | = | Volume of .......... ml |
| Titre ........ (ml) * 16 * 20 (ml) * X ........ (M) | |||||
| Then SO2 (ppm) | = | ---------------------------------------------- | = ......... ppm | ||
| 0.0100 (M) * V ........ (ml) |