美国国家标准技术研究所(National Institute of Standards and Technology，简写为NIST) 
NIST is a registered trademark of National Institute of Standards and Technology。NIST的前身为国家标准局(NBS，1901年~1988年)是一家测量标准实验室，属于美国商务部的非监管机构。
This Standard Reference Material (SRM) is intended primarily for validation of methods for determining proximates, fatty acids, cholesterol, vitamins, elements, amino acids, and nucleotides in infant and adult nutritional formulas and similar materials. This SRM can also be used for quality assurance when assigning values to in-house reference materials. The SRM is a milk-based, hybrid infant/adult nutritional powder prepared by a manufacturer of infant formula and adult nutritional products. A unit of SRM 1849a consists of 10 packets, each containing approximately 10 g of material.

Infant/Adult Nutritional Formula (1849a)产品详细：

Each packet contains approximately 10 grams of a milk-based powder, a blend of material similar to the infant and adult versions of just-add-water nutritional powders you can buy in the grocery store. The material, provided by a manufacturer, is close to the consumer versions, but is "not an actual infant formula, because you don't want it to be confused with anything real," says Melissa Phillips, one of the NIST scientists who coordinated the analysis of this reference material. It's not so important that the material matches an actual consumer product, just that it's been assessed with NIST's usual rigor and is available for others to do the same.

Other Notes
Certified for the analytes listed below. See certificate for values and more details
Solids, Ash, Protein, Carbohydrates, Lactose Monohydrate, Calories, Fat (extracted), Fat (as the sum of fatty acids as triglycerides), Saturated Fatty acids, Cis-Monounsaturated Fatty acids, Cis-Polyunsaturated acids, Omega-3 Fatty acids, Omega-6 Fatty acids, Total trans C18:1 Fatty acids, Total trans Fatty acids, Cholesterol, Phosphorous (P)
Amino acids:
Alanine, Arginine, Aspartic acid, Cysteine, Glutamic acid, Glycine, Histidine, Isoleucine, Leucine, Lysine, Phenylalanine, Proline, Serine, Taurine, Threonine, Tryptophan, Tyrosine, Valine
Lipids and Fatty acids:
Caproic acid, Capric acid, Caprylic acid, Lauric acid, Myristic acid, Margaric acid, Palmitic acid, Palmitoleic acid, Stearic acid, Oleic acid, Vaccenic acid, Linoleic acid, a-Linoleic acid, Arachidic acid, Arachidonic acid, Behenic acid, DHA, Lignoceric acid, Nervonic acid, (Z,E)-9,12-Octadecadienoic acid (C18:2), (E,Z)-9,12-Octadecadienoic acid (C18:2), (Z,Z,Z)-6,9,12-Octadecatrienoic acid (C18:3 n-6), Gondoic acid
Trace Elements:
Calcium (Ca), Copper (Cu), Chromium (Cr), Iodine (I), Magnesium (Mg), Manganese (Mn), Molybdenum (Mo), Potassium (K), Selenium (Se), Sodium (Na), Zinc Zn)
Vitamins:
Ascorbic acid (Vitamin C), Biotin, Carnitine, Cholecalciferol (Vitamin D3), Choline Ion, Folic acid, Niacinamide (Vitamin B3), Pantothenic acid (Vitamin B5), Pyridoxine (Vitamin B6), Retinol (Vitamin A), Retinyl Palmitate (Vitamin A), Riboflavin (Vitamin B2), Thiamine (Vitamin B1), α-Tocopheryl acetate (Vitamin E), Total α-Tocopherol (Vitamin E), Phylloquinone (Vitamin K1), 5-Methyltetrahydrofolate, myo-Inositol
Nucleotides: Adenosine Monophosphate, Cytidine Monophosphate, Guanosine Monophosphate, Uridine Monophosphate

全脂奶粉标准品
SRM 1549a Whole Milk Powder 
5 pouches x 10 g

Certified for the analytes listed below. See certificate for values and more details
Ash, Carbohydrates, Fat (as the sum of fatty acids as Free Fatty acids), Phosphorous (P), Protein, Solids
Amino acids: Alanine, Arginine, Aspartic acid, Cysteine, Glutamic acid, Glycine, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Serine, Threonine, Tryptophan, Tyrosine, Valine
Lipids and Fatty acids: Butyric acid, Capric acid, Caproic acid, Caprylic acid, Cholesterol, DPA, Lauric acid, Linoleic acid, Margaric acid, Margaroleic acid, Myristic acid, Myristoleic acid, Oleic acid, Palmitic acid, Palmitoleic acid, Pentadecanoic acid (C15:0), Stearic acid, trans-Palmitelaidic acid, Tridecanoic acid (C13:0), Vaccenic acid, a-Linolenic acid
Trace Elements: Barium (Ba), Calcium (Ca), Copper (Cu), Iodine (I), Iron (Fe), Magnesium (Mg), Manganese (Mn), Molybdenum (Mo), Nickel (Ni), Potassium (K), Selenium (Se), Sodium (Na), Strontium (Sr), Zinc Zn)
Vitamins: 25-Hydroxyvitamin D3, Ascorbic acid (Vitamin C), Biotin, Carnitine, Cholecalciferol (Vitamin D3), Choline, Niacinamide (Vitamin B3), Pantothenic acid (Vitamin B5), Pyridoxal, Pyridoxamine (Vitamin B6), Riboflavin (Vitamin B2), Thiamine (Vitamin B1), Total Vitamin B6 as Pyridoxal, Vitamin B12


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更多基质标准品， 欢迎联系我们。

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