b-Carotene

beta-胡萝卜素

脂溶性维生素套标, Fat-Soluble Vitamin Kit

VPH15种稀释套标, VPH Primary Dilution Standard,2000 μg/mL in MeOH

碱度标准品, Alkalinity Standard,1000 μg/mL in Water

PH-10标准品, Inorganic Wet Chemical pH Std,pH 10 in Water

二氧化硅标准溶液, Silicon Dioxide Standard,1000 μg/mL in Water, tr Hydrofluoric acid

总有机碳, Total Organic Carbon Std,1000 μg/mL in Water, tr Sulfuric acid

21种耐磨金属混标, Wear Metals Standard,10 μg/g in 75 cSt Base oil

21种耐磨金属混标, Wear Metals Standard,500 μg/g in 75 cSt Base oil

ASTM D5185 21种耐磨金属套标(不含金属磺酸盐), 21 Element Wear Metal Curve