title: Development and certification of the new SRM 695 trace elements in multi-nutrient fertilizer.
abstract: During the past seven years, several states within the US have enacted regulations that limit the amounts of selected non-nutritive elements in fertilizers. Internationally, several countries, including Japan, China, and Australia, and the European Union also limit the amount of selected elements in fertilizers. The elements of interest include As, Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Se, and Zn. Fertilizer manufacturers and state regulatory authorities, faced with meeting and verifying these limits, need to develop analytical methods for determination of the elements of concern and to validate results obtained using these methods. Until now, there were no certified reference materials available with certified mass fraction values for all elements of interest in a blended, multi-nutrient fertilizer matrix. A new standard reference material (SRM) 695 trace elements in multi-nutrient fertilizer, has been developed to help meet these needs. SRM 695 has recently been issued with certified mass fraction values for seventeen elements, reference values for an additional five elements, and information values for two elements. The certificate of analysis includes an addendum listing percentage recovery for eight of these elements, determined using an acid-extraction inductively-coupled plasma optical-emission spectrometry (ICP-OES) method recently developed and tested by members of the Association of American Plant Food Control Officials.
authors.affiliation: National Institute of Standards and Technology, 100 Bureau Drive, Mailstop 8395, Gaithersburg, MD 20899, USA. lmackey@nist.gov
authors.forename: E A
authors.initials: EA
authors.lastname: Mackey
authors.forename: M P
authors.initials: MP
authors.lastname: Cronise
authors.forename: C N
authors.initials: CN
authors.lastname: Fales
authors.forename: R R
authors.initials: RR
authors.lastname: Greenberg
authors.forename: S D
authors.initials: SD
authors.lastname: Leigh
authors.forename: S E
authors.initials: SE
authors.lastname: Long
authors.forename: A F
authors.initials: AF
authors.lastname: Marlow
authors.forename: K E
authors.initials: KE
authors.lastname: Murphy
authors.forename: R
authors.initials: R
authors.lastname: Oflaz
authors.forename: J R
authors.initials: JR
authors.lastname: Sieber
authors.forename: M S
authors.initials: MS
authors.lastname: Rearick
authors.forename: L J
authors.initials: LJ
authors.lastname: Wood
authors.forename: L L
authors.initials: LL
authors.lastname: Yu
authors.forename: S A
authors.initials: SA
authors.lastname: Wilson
authors.forename: P H
authors.initials: PH
authors.lastname: Briggs
authors.forename: Z A
authors.initials: ZA
authors.lastname: Brown
authors.forename: J
authors.initials: J
authors.lastname: Budahn
authors.forename: P F
authors.initials: PF
authors.lastname: Kane
authors.forename: W L
authors.initials: WL
authors.lastname: Hall
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000379:methods* / Q000592:standards*; D005308:Fertilizers / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic / Q000379:methods; D014131:Trace Elements / Q000032:analysis*
chemical_list: D005308:Fertilizers; D014131:Trace Elements