原文由 娴闲(v2665123) 发表:
楼主搞错了吧,应该不是样品的PH,是0.07mol盐酸的PH,这个应该是不难的,只要盐酸标定在范围(0,07 ± 0,005) mol/l内应该就OK的。如果样品的PH要控制1.12~1.19就吓死人了。
Replace 6.1.1 with the following:
"6.1.1 Hydrochloric acid solution, c(HCl) = (0,07 ± 0,005) mol/l.
The pH of the solution shall be checked with a calibrated pH meter in front of any analysis with this method, at least daily, and shall be between 1,12 and 1,19 at about 20 °C."
原文由 steven(myoak) 发表:原文由 娴闲(v2665123) 发表:
楼主搞错了吧,应该不是样品的PH,是0.07mol盐酸的PH,这个应该是不难的,只要盐酸标定在范围(0,07 ± 0,005) mol/l内应该就OK的。如果样品的PH要控制1.12~1.19就吓死人了。
Replace 6.1.1 with the following:
"6.1.1 Hydrochloric acid solution, c(HCl) = (0,07 ± 0,005) mol/l.
The pH of the solution shall be checked with a calibrated pH meter in front of any analysis with this method, at least daily, and shall be between 1,12 and 1,19 at about 20 °C."
不只是盐酸,后面的样品也是一样的要求。
原文由 娴闲(v2665123) 发表:原文由 steven(myoak) 发表:原文由 娴闲(v2665123) 发表:
楼主搞错了吧,应该不是样品的PH,是0.07mol盐酸的PH,这个应该是不难的,只要盐酸标定在范围(0,07 ± 0,005) mol/l内应该就OK的。如果样品的PH要控制1.12~1.19就吓死人了。
Replace 6.1.1 with the following:
"6.1.1 Hydrochloric acid solution, c(HCl) = (0,07 ± 0,005) mol/l.
The pH of the solution shall be checked with a calibrated pH meter in front of any analysis with this method, at least daily, and shall be between 1,12 and 1,19 at about 20 °C."
不只是盐酸,后面的样品也是一样的要求。
哇噻,还真是啊!!!!!!!!!!!!!!!!!!!!
还用2mol的盐酸调,一滴PH就到1了,怎么调1.12~1.19啊,简直不让活了。
原文由 依风1986(xurunjiao5339) 发表:原文由 娴闲(v2665123) 发表:原文由 steven(myoak) 发表:原文由 娴闲(v2665123) 发表:
楼主搞错了吧,应该不是样品的PH,是0.07mol盐酸的PH,这个应该是不难的,只要盐酸标定在范围(0,07 ± 0,005) mol/l内应该就OK的。如果样品的PH要控制1.12~1.19就吓死人了。
Replace 6.1.1 with the following:
"6.1.1 Hydrochloric acid solution, c(HCl) = (0,07 ± 0,005) mol/l.
The pH of the solution shall be checked with a calibrated pH meter in front of any analysis with this method, at least daily, and shall be between 1,12 and 1,19 at about 20 °C."
不只是盐酸,后面的样品也是一样的要求。
哇噻,还真是啊!!!!!!!!!!!!!!!!!!!!
还用2mol的盐酸调,一滴PH就到1了,怎么调1.12~1.19啊,简直不让活了。
每次测前都要保证啊!