10.1 Calculate the amount of chloride present in the aqueous solution, in µmol, by means of the following equation:
A = amount of chloride found in the aliquot of the aqueous extract (see 10.1), µmol,
P = proportional part of extract used in analysis; P = 50/158 for ethanol and 50/152 for isopropyl alcohol (see Note 6), and
m = mass of the sample, g.
NOTE 6 - If the water content of the sample (for example, in accordance with Test Method D 4006) is less than 5 % (m/m), the volume of the extract from a single extraction may be assumed to be 158 mL when using ethanol or 152 mL when using isopropyl alcohol. Hence P will be 50/158 or 50/152. If, however, the water content of the sample exceeds 5 % (m/m), the appropriate amount of water should be added in calculating P.
11. Report
11.1 Report the result calculated in 10.2 as salt (as NaCl), mass %, rounding to two significant digits. State that the result was obtained in accordance with Test Method D 6470.