DILUTED STANDARD LEAD SOLUTION— Dilute an accurately measured volume of Standard Lead Solution (see Heavy Metals <231> ) [containing 10 μg of lead per mL], with 9 volumes of dilute nitric acid (1 in 100) to obtain a solution that contains 1 μg of lead per mL.
中的9volumes，这个volumes是多少




an (One) accurately measured volume of Standard Lead Solution:9 volumes of dilute nitric acid (1 in 100)
就是说：取1体积的标准铅溶液和9体积的稀硝酸(1 in 100) ，即：标准铅溶液-稀硝酸(1 in 100) （1:9）.




楼上完全正确，就是稀硝酸溶液稀释10倍标准铅溶液，说的事体积比。也就是10ug/ml—>1ug/ml