The operation of GB-method is complicated in detecting nitrate and nitrite,needing professional operator,reagents used in determination were easily to lose efficacy and harmful to operator health.

• 国标方法检测硝酸盐、亚硝酸盐操作繁琐,需要专业技术人员操作,试剂易失效且会对操作者的健康造成伤害。