-
硫酸亚铁铵溶液 for 250 ml, c[(NH4)2Fe(SO4)2] = 0.1 mol/l (0.1 N) Titrisol®
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of electrolytic conductivity, traceable to PTB and NIST (c = 0.001 mol/l) CertiPUR®
Potassium chloride solution (nominal 0.147 mS/cm) certified reference material for the measurement
-
of electrolytic conductivity, traceable to PTB and NIST (c=0.01 mol/l) CertiPUR®
Potassium chloride solution (nominal 1.41 mS/cm) certified reference material for the measurement
-
of electrolytic conductivity, traceable to PTB and NIST (c=0.01 mol/l) CertiPUR®
Potassium chloride solution (nominal 1.41 mS/cm) certified reference material for the measurement
-
GBW09115 水中硒 / 介质:2.0 mol/L HNO3 (2.0摩尔/升硝酸)
中国计量院北京二甲基砷 4.3 ×10-9mol/瓶 U=7.0% 亚砷酸根 0.758 ×10-9mol/瓶 U=2.1% 一甲基砷 1.03 ×10-9mol/瓶 U=7.8
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磷酸钾缓冲液,0.01mol/L,pH5.8
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磷酸钾缓冲液,0.01mol/L,pH6.0
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磷酸钾缓冲液,0.01mol/L,pH6.2
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磷酸钾缓冲液,0.01mol/L,pH6.4
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磷酸钾缓冲液,0.01mol/L,pH6.6
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