使用甲醛固定液最好的溶液pH是
- A6
- B7.8~8.0
- C9
- D7.0~7.2
- E8.2
中性缓冲甲醛固定液配方是A40%甲醛10ml,蒸馏水90mlB10%甲醛10ml,0.01mol/L pH7.4的PBS 90mlC40%甲醛10ml,0.01mol/L pH7.4的PBS 90mlD10%甲醛10ml,蒸馏水90mlE4%甲醛10ml,0.01mol/L pH7.4的PBS 90ml
中性缓冲甲醛固定液配方是()。A40%甲醛10ml,0.01mol/L蒸馏水90mlB10%甲醛10ml,0.01mol/LpH7.4的PBS90mlC40%甲醛10ml,0.01mol/LpH7.4的PBS90mlD10%甲醛lOml,O.01mol/L蒸馏水90mlE40%甲醛10ml,O.01mol/LpH7.4的PBS100ml
中性缓冲甲醛固定液配方是A40%甲醛10ml,0.01mol/L蒸馏水90mlB40%甲醛10ml,0.01mol/L pH7.4的PBS90mlC40%甲醛10ml,0.01mol/L pH7.4的PBS100mlD10%甲醛10ml,0.01mol/L pH7.4的PBS90mlE10%甲醛10ml,0.01mol/L蒸馏水90ml
4、采用甲醛法测定饮料中的氨基酸态氮时,需要将甲醛溶液的pH调为()。
采用甲醛法测定饮料中的氨基酸态氮时,需要将甲醛溶液的pH调为()。A7.0B7.8C8.1D9.2
中性缓冲甲醛固定液配方是()AA.40%甲醛10ml,0.01mol/L蒸馏水90mlBB.10%甲醛10ml,0.01mol/LpH7.4的PBS90mlCC.40%甲醛10ml,0.01mol/LpH7.4的PBS90mlDD.10%甲醛10ml,0.01mol/L蒸馏水90mlEE.40%甲醛10ml,0.01mol/LpH7.4的PBS100ml
6、甲醛标准溶液临用时,将甲醛标准贮备液用水稀释成1.00ml含10μg甲醛,立
甲醛标准溶液临用时,将甲醛标准贮备液用水稀释成1.00ml含10μg甲醛,立即再取此溶液10.00ml加入100ml容量瓶中加入5ml吸收原液,用水定容至100ml此液1.00ml()μg甲醛。A0.50B10.00C0.10D1.00