EN 1482-1:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling plans and quantitative data
5 Incremental sampling methods
6 Reduction of aggregate sample
7 Division into final samples
8 Practical arrangements for final (laboratory) samples
9 Sampling report
Annex A (normative) Test for bias in mechanical samplers
Annex B (informative) Examples of rotating sample dividers
Annex C (normative) Test for bias in a rotary divider
Annex D (informative) Examples of apparatus for sampling
                      fluid fertilizers
Annex E (normative) Methods of mixing for fluid fertilizers
Bibliography

This European Standard specifies a method for the chromatographic determination of the amount of iron chelated by each of the individual isomers of the chelating agent ortho para EDDHA (o,p-EDDHA) in fertilizers. The method allows the identification of this chelating agent and the determination of the water soluble fraction of iron chelated by this chelating agent. The method is not applicable for the determination of the amount of free chelating agent.NOTE 1This method has been shown to be also suitable for the determination of the amount of iron chelated by each of the individual isomers of the chelating agent ortho ortho EDDHA (o,o-EDDHA) in fertilizers.NOTE 2o,o-EDDHA and o,p-EDDHA are abbreviations used in this European Standard for the sake of simplicity. For complete names see Annex C.NOTE 3The substances o,o-EDDHA and o,p-EDDHA both exist as different stereoisomers. For o,o-EDDHA a meso form and a d/l pair (the racemic isomers) exist, for o,p-EDDHA two different d/l pairs exist. All four stereoisomers are observed separately in this method.NOTE 4Currently, an analytically pure standard only exists for o,o-EDDHA. The method for o,p-EDDHA has been developed with an o,p-EDDHA standard containing an uncertain concentration of o,p-EDDHA.