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1 Using the 0.5% Ninhydrin solution to color, the effect is best.

2 Methods:Color reaction of free amino acids with ninhydrin was adopted, since, in certain extent, the color depth is correlated with the amino acid content.

3 A high performance cation-exchange chromatography with ninhydrin post-column derivatization method for the determination of amino acids was described.

4 The methods of ninhydrin and molybdenum blue, and bi directional soil section slicing were used.

5 Its ninhydrin reaction was negative, but after acid hydrolysis, its ninhydrin reaction and biuret reaction were positive.

6 Through continuous improvement and experiment, I found using A4 paper Ninhydrin and Ninhydrin solution combination made of dry film (wet) method appeared to pass the stick are display objects.

7 Methods The contents of glutamate and acidic peptide in the brains of rats were measured by paper electrophoresis, ninhydrin colouring, spectrophotometry and standard curve method.

8 The proof of grafting was established by IR spectra, ninhydrin test,[www.Sentencedict.com] nitrogen estimation and other analytical methods.

9 The surface amino group was transferred to the aldehyde group after it reacted with ninhydrin. The surface aldehyde group was confirmed by the mirror reaction.

10 It was conducted to determine the lysine content of harvested grain in 100 different varieties or lines in wheat by ninhydrin colorimetry method.