How do we dispel in production and life? Let me give you a detailed explanation of the digestion method and steps.
Sample digestion method:
1. Food sample digestion:
(1) Move the digestion device into the kitchen and heat it to 120 °C.
(2) Liquid sample (such as white wine, purified water, natural water, etc.) draw 1-10.0ml (sample into the digestive tract, add three glass beads), put the digestive tube into the digestion apparatus and heat it to near dry at 120 °C, add 1.0 Ml (digestion solution 240 ° C constant digestion to near dry, take off and let cool, determine the volume to determine the volume).
(3) General foods (such as color wine, beverages, fruit sugar, granules, noodles, porridge, etc.) Weigh 0.500-1.000g samples into the digestive tract, add three glass beads, add 10.0ml digestive juice, digest The tube is placed in a digestion apparatus at 160 ° C for about 1-3 h) until the digestive juice is clarified, and the temperature is digested to completion at 240 ° C, and it is taken to a cold, and the volume is measured to a certain volume.
(4) Foods containing a lot of oil and sediment (such as meat, sausage, soybean oil, milk powder, milk sugar, chocolate, etc.) Weigh 0.300-0.500g sample into the digestive tract, add three glass beads, add 10ml digestive juice, The digestive tube is placed in a digestion apparatus and digested at 160 ° C for 3 h. If the solution has been clarified at 240 ° C, the temperature is digested to near dryness, and the cooling is taken off, and the volume is adjusted to a certain volume for measurement.
2. Water sample digestion:
1.00-10.0ml sample into the digestive tract, add three glass beads, put the digestive tube into the digestion apparatus and heat it to near dry at 120 °C, add digestive agent (clean water added 0.50ml digestive agent, sewage added 2ml digestive agent) 240 °C Constant temperature digestion to near dry take off and cool, constant volume for a certain volume.
3, sample digestion:
Weigh 0.200g sample into the digestive tract and add three glass beads to 5.0ml of digestive juice on the digestion instrument for digestion at 160 ° C for 30min. 240 ° C constant digestion to near dry, take off and let cool, constant volume to a certain volume for determination.
4, cosmetics digestion:
Take 0.100-0.200g of cosmetics into the digestive tract, add 3 glass beads to add 5-10ml digestive juice, digest at 1200h for 1-2h until the solution is clarified at 240 °C and digest to near dryness, remove and let cool, and make a certain volume for determination.
You can directly purchase the MHY-27759 digital display constant temperature digestion instrument to carry out the above digestion.
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