【名词&注释】
淋巴瘤(lymphoma)、缓冲溶液(buffer solution)、枸橼酸(citrate)、磷酸缓冲液(phosphate buffer)
[单选题]枸橼酸-磷酸缓冲液(phosphate buffer)的pH范围是()
A. pH2.2~3.6 B. pH5.29~8.04 C. pH2.6~7.0 D. pH5.0~7.4 E. pH5.2~8.6