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pH试纸 non-bleeding pH 0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14
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四草酸钾 certified secondary standard reference material for pH measurement
Potassium tetraoxalate dihydrate certified secondary standard reference material for pH measurement
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瑞香酚蓝指示剂 indicator ACS,Reag. Ph Eur
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麝香草酚蓝 indicator ACS,Reag. Ph Eur
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麝香草酚蓝 indicator ACS,Reag. Ph Eur
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2",7"-二氯荧光素 indicator ACS,Reag. Ph Eur
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紫尿酸铵 (ammonium purpurate) metal indicator ACS,Reag. Ph Eur
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紫尿酸铵 (ammonium purpurate) metal indicator ACS,Reag. Ph Eur
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瑞香酚蓝指示剂 indicator ACS,Reag. Ph Eur
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缓冲液 traceable to SRM from NIST and PTB 10 x pH 4.01 (phthalate), 10 x pH 7.00
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