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Stability of Spin Columns

Details
Sample      Column Conc.,ng/μL m,μg A260/A280 A260/A230
NP30-A: 1 year of storage Customer A Kit 141 14.1 1.9 2
147 14.7 1.8 2.1
151 15.1 1.9 2.2
NP30-A: New lot. Customer A Kit 142 14.2 1.8 2.2
159 15.9 1.8 1.8
149 14.9 1.8 2.3
NP30-A: 1 year of storage QIAprep Spin 
Miniprep Kit
Qiagen, Cat.
No 27104
168 16.8 1.8 2.0 
178 17.8 1.9 2.1
160 16.0  1.8 2.0 
NP30-A: New lot. QIAprep Spin 
Miniprep Kit
Qiagen, Cat.
No 27104
162 16.2 1.8 2.1
169 16.9 1.8 2.1
169 16.9 1.9 2.0 

Results: NP30-A show good performance after one year storage.
 

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