title: Spectrophotometric determination of boron in dates of some cultivars grown in Saudi Arabia.
abstract: The formation of a red complex between boron and the quinalizarin reagent was investigated and used as the basis for a simple and sensitive spectrophotometric method for boron in date cultivars. At 620 nm, the absorbance was linear (r = 0.999) over the 0.25-2.5 micrograms/mL concentration range. The molar absorptivity was found to be 2.23 x 10(3) mol-1 cm-1 and the relative standard deviation for 10 replicates (1.0 micrograms/mL) was 0.97%.
authors.affiliation: King Saud University, College of Science, Chemistry Department, Riyadh, Saudi Arabia.
authors.forename: A A
authors.initials: AA
authors.lastname: al-Warthan
authors.forename: S S
authors.initials: SS
authors.lastname: al-Showiman
authors.forename: S A
authors.initials: SA
authors.lastname: al-Tamrah
authors.forename: A A
authors.initials: AA
authors.lastname: BaOsman
mesh_terms: D001895:Boron / Q000032:analysis*; D003124:Colorimetry; D005638:Fruit / Q000737:chemistry*; D007202:Indicators and Reagents; D012529:Saudi Arabia; D012639:Seeds / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D007202:Indicators and Reagents; D001895:Boron