Do not throw away test samples. including chemicals or various standard solutions used in testing Until the accuracy of the analyzed data has been verified or the cause of the problem has been concluded.
Do not discard test samples, including chemicals or standard solutions used for testing, before verifying analysis data or determining the cause of the problem.
Before the accuracy of the analyzed data is verified or the cause of the problem is concluded, the test samples, including various chemicals or standard solutions used for testing, shall not be discarded at will.