Take off a piece of brief glass and chemical stability

A variety of USES glass, have certain chemical stability requirements. Poor chemical stability of flat glass, for example, tend to be affected with damp be affected with damp sticky piece in storage transportation; Optical instruments under the action of all kinds of lens in the atmosphere and water will be moldy scrap; Chemical instrument glass due to erosion and impact analysis results; Bulb glass shell due to weathering and hair; Especially used in packing medicine injections of glass, such as ampoule bottle, salt bottle, under the condition of autoclave sterilization and various climate long-term contact with the liquid medicine, in the case of poor chemical stability, the glass will dissolve in liquids, even slices off ( Said to take off the film) , light person affect the quality of liquids, the person that weigh seriously affect people's health, even life-threatening, so any glass products must have it by chemical stability index. （ P122）
glass chemical stability is a very complex physical and chemical behavior. General glass products in the atmosphere and water solution requires only have good durability. Liquid fuel or chemical reagent bottles should choose according to the nature of liquid glass composition. Medical ampoules are vial varieties nature of liquids, requirements of packaging material is higher, generally use & other; Neutral materials & throughout; 。 （ P128） Glass bottle some special erosion condition

glass & other; Take off a piece of & throughout;

alkali resistance take off a piece of glass is an important medical ampoule bottle glass product inspection standards. When poor chemical stability of glass ampoules costumes alkaline ( PH8 - - 12) Injection solution, after the autoclave or long-term storage, due to erosion of liquids and opacity. Contain the take off a piece of injection can seriously damage people's health, even life-threatening. Will happen so take off a piece of the ampoule bottle of medicine is absolutely disabled.

take off a piece of inspection method usually imitate ampoule injection medicine pharmaceutical packaging sterilization conditions, with good cleaning ampoule bottle packaging 0. NHCL and 0 01. Naoh, 001 in autoclaved kettle as in table 1. 5 kg/cm2 ( 121℃） Heating under 30 minutes, cooling fluorescent lamp is prepared after visual inspection, usually there will be no acid piece, and alkali piece shall not be greater than 2%, actually should be confirmed to take off. ( P129- - 130).