@article{oai:cur-ren.repo.nii.ac.jp:00000163,
 author = {Shimada, Yoshihiro and Shimada, Yoshihiro},
 journal = {Chugokugakuen journal},
 month = {},
 note = {An external standard added the hippuric acid, m-methylhippuric acid and mandelic acid to the artificial
urine and human urine were prepared for the quality control of biological monitoring.Thereafter, the specimens were kept at 25OC for 1, 2 and 4 weeks after freeze-drying, and change in concentrations during storage was examined by high performance liquid chromatography.
The ratio of the concentrations of the three acids and creatinine after freeze-drying compares to that before storage was about 99 per cent or above under the storage condition at 25°C for 4 weeks.},
 pages = {1--4},
 title = {Storage of Authentic Sample for Biological Monitoring of\nOrganic Solvents},
 volume = {6},
 year = {2007}
}