The Commissioner of Agriculture and Industries and officers and employees under his supervision or direction shall have authority to enter and inspect any premises or vehicle where any food, drug, or cosmetic regulated by this chapter is manufactured, harvested, processed, compounded, refined, packed, packaged, stored, sold, or transported, and all equipment, containers, and materials therein, to collect samples for analysis and to conduct examinations and investigations of records of production, purchases, and sales for the purpose of enforcement of this chapter.