Stechert J, Jantz A
Nahrung. 1976;20(5):519-23.
The authors report of a modification to the vitamin B1 determination (thiochrome method) according to the Specification TGL 18230. Extract purification is considerably simplified by using the KPS cation exchanger. The measurements were performed by means of the Spekol spectrophotometer with fluorescence attachment. In this way, also industrial laboratories with modest outfit are enable to make vitamin B1 determinations. Already after 2-3 months of storage, the thiamine values of the fruit and vegetable baby foods tested lay in part at the lower limit of the stated values. Possibilities of improving the thiamine values are discussed.
作者报告了根据TGL 18230规范对维生素B1测定法（硫色素法）的一种改进。使用KPS阳离子交换剂可大大简化提取物的纯化过程。测量是通过配备荧光附件的Spekol分光光度计进行的。这样一来，即使是设备普通的工业实验室也能够进行维生素B1的测定。在储存2至3个月后，所测试的水果和蔬菜婴儿食品中的硫胺素值部分已处于规定值的下限。文中还讨论了提高硫胺素值的可能性。
