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Method for the determination of formaldehyde in aquatic products: capillary column chromatography
Determination of formaldehyde in aquatic products by capillary column chromatography
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How do you solve the problems encountered during protein determination?
Protein determination problems
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Determination methods for the trace elements iron, zinc, and manganese
Determination of iron, zinc, and manganese
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Four determinations for high-yield fertilization of spring corn
In recent years, due to the lack of organic fertilizer input and people's demand for increased unit yield, the amount of corn fertilization has increased significantly, and the application area of some high-concentration compound (mixed) fertilizers has also continued to expand, effectively promoting yield increases, but seedling-stage fertilizer damage, nutrient deficiency symptoms, or late-stage fertilizer loss and yield reduction also often occur, and farmers...
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Introduction to the Content Determination Method for Aminophylline Tablets
Anhydrous theophylline - Take 20 tablets of this product, weigh accurately, grind finely, weigh accurately an appropriate amount (approximately equivalent to 100 mg of aminophylline), place in a 200 ml volumetric flask, add 20 ml of 0.1 mol/L sodium hydroxide solution and 60 ml of water, shake for 10 minutes to dissolve the aminophylline, dilute to volume with water, mix well; filter, accurately measure 5 ml of the subsequent filtrate, place in a 250 ml volumetric flask, dilute to volume with 0.01 mol/L sodium hydroxide solution, mix well, and follow the spectrophotometric method (Appendix page 17)
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There is a knack to processing dried lilies, and the three observations and three determinations are key
In our province, lilies are mainly sold as dried lilies to coastal areas, and in recent years they have consistently sold well. In particular, large, plump, and pure white high-quality dried lilies are in great demand and fetch high prices. Whether dried lilies are high quality or not, processing is a key step. Some farmers report that their fresh lilies are of good quality, but after processing into dried lilies they become second-grade products, or even inferior products, showing non-white color, thin dried slices, and incomplete slices, and the market price is greatly reduced. This is mainly caused by improper processing. In the lily production bases of Daping, Leijia'ao, Shawan, and other places in Niangxi Town, Xinshao County, lilies are planted year-round.
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