From doing try to know Titration value quantity of vitamin c that is in conflict with hypothesis. Article 1 white varieties of grapefruit juice, honey has a higher vitamin c juice grapefruit varieties throndee. Article 2 pomelo juice from the blender and then filtering quantity of vitamin C more than the pomelo juice from squeezing and filtering by filter cloth. Conclusion pomelo juice varieties throndee from the blender and then filtering quantity of vitamin than.