A modified method for determination of boron with curcumin and a simplified water elimination procedure

The universal ratio of boron to chlorinity for the North Pacific and North Atlantic oceans

“…The tight coupling between B and Cl values contrasts with the measurements of Uppströ m (1974) on 20 samples from various water column depths (surface to 4400 m) at four tropical Pacific Ocean sites, which yielded B/Cl ratios of 0.224-0.243. This variability is an order of magnitude greater than the precision of 0.9-1.6% reported for B concentration measurement over the range 0.5-8 mg kg À1 (Uppströ m, 1968). Assuming that the marked vertical variability in the B/Cl ratio reported by Uppströ m (1974) is not an analytical artifact, there must be some as-yet undefined process that causes the B/Cl ratio to deviate from a constant value.…”

“…To estimate B concentrations in seawater, a B (mg kg À1 ) to chlorinity (&) ratio of 0.232 (Uppströ m, 1974) has been widely used for more than three decades. However, this ratio could be erroneous because it was based on only 20 measurements made on Pacific Ocean samples, and the B measurement protocol (Uppströ m, 1968) used in analysis of these samples was questionable (Liu and Lee, 2009). Accurate B concentration data are also critical in reconstructing paleo-ocean pH using the B/Ca ratio (e.g.…”

Deviation of Boron Concentration From Predictions Using Salinity in Coastal Environments

“…The protocol of Y.‐M. Liu and Lee () provides key improvements to the original protocol of Uppström (). The analysis of samples having low B content (10 samples from six major Korean rivers) was based on the protocol of Y.‐M.…”

Substoichiometric Isotope Dilution Mass Spectrometry of Boron by the Ion-Pair Extraction with Halogenated Salicyl Alcohol Derivatives and a Quaternary Ammonium Salt

“…Various analytical methods for the determination of boron, such as spectrophotometry, [2][3][4][5][6][7][8][9][10][11][12] fluorometry, 13,14 electrothermal atomic absorption spectrophotometry, 15,16 inductively coupled plasma optical emission spectrometry, 17,18 inductively coupled plasma mass spectrometry, 19,20 and neutron activation analysis, 21,22 have been used in various fields. Since these methods are based on the comparative method with calibration standards or calibration curves, they cannot escape from matrix effect caused by sample matrices.…”