The Sievers Boron Analyzer has an LOD of 0.015 ppb B.

Sievers UPW Boron Analyzer Specifications

Operating Specifications
Concentration Range 0.05 ppb B
Limit of Detection (LOD) 0.015 ppb B
Accuracy ± 0.01 ppb B <0.05 ppb B
± 15% >0.05 ppb B
Precision ± 3% or 0.005 ppb B, whichever is greater
Minimum Sample
Resistivity		 15 megaohms–cm
Sample Temperature 15°-40°C
Sample Flow Rate 0.05–0.5 L/min
Ambient Temperature 10°C–40°C
Sample Pressure 20–100 psi (138-689 kPa)
Calibration Stability At least 12 months
Sample Particulates 15 micron sample pre-filtration
Waste Gravity Drain
Instrument Specifications
Inputs 5 isolated binary inputs
Outputs 4 isolated 4-20mA outputs, 1 RS-232 (isolated), 1 universal parallel printer port, 2 alarm outputs, 4 isolated binary outputs
Dimensions 21.1 H x 17.4 W x 13.1 D inches (54 x 45 x 34 cm)
Weight 48 lbs (22kg)
Certifications CE (click here for the Declaration of Conformity)
Consumables
Boron Reagent 90 days at 5 samples/hour
45 days at 10 samples/hour
Reagent Column 12 months
Zero Column 12 months