# Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996, Paragraph 6: EXPRESSION OF RESULTS


Express the result of the analysis as the percentage of chlorine contained in the sample as received for analysis.
Calculate the percentage of chlorine (Cl) content from the formula:
Cl%=0.03545×T×(V5-V4)×100m where:
T is the molarity of silver nitrate solution used;
V4 is the result, in ml, of the blank test (5.2);
V5 is the value, in ml, of Veq corresponding to the determination (5.4);
m is the mass, in grams, of the test portion.
TABLE 1
Example
Volume of the silver nitrate solution V
Potential E
Δ1E
Δ2E
ml
mv
4.80
176
35
4.90
211
+37
72
5.00
283
−49
23
5.10
306
−10
13
5.20
319
Veq=4.9+0.1×3737+49=4.943

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Source: https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/chapter/14f./paragraph/6 (the official version)
Page: https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-14f./paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.