Calibration Standard Kit Back Catalog number: 53089 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9282.28-100-ME Sildenafil citrate,100 µg base/mL,MeOH,1mL Price on request 50795 Alkalinity as Calcium Carbonate Price on request 673903 Azoxystrobin Metabolite R402173, 10.0 µg/ml, Acet Price on request