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Thomas pH Meters & Supplies
Thomas Orbital Shakers
Description:Standard, 1 mL = 1 mg NH3, 1000 ppm NH3 (822 ppm N)
Catalog #
C027B13
Description:Standard, 1000 ppm, 1 mL= 1 mg N (APHA)
C544R20
C544R24
Description:Standard, 1000 ppm, 1 mL=1 mg NH3 (APHA)
C544R26