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GB/T 17815-2018: Determination of propionic acid, propionate in feeds
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 17815-2018	English	199	Add to Cart	3 days [Need to translate]	Determination of propionic acid, propionate in feeds
GB/T 17815-1999	English	199	Add to Cart	2 days [Need to translate]	Determination of propionic acid, propionate in feeds

GB/T 17815-2018: Determination of propionic acid, propionate in feeds

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Determination of propionic acid, propionate in feeds ICS 65.120 B46 National Standards of People's Republic of China Replace GB/T 17815-1999 Determination of propionic acid and propionate in feed Published on.2018-09-17 Implementation of.2019-04-01 State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 17815-1999 "Determination of propionic acid and propionate in feed". This standard is compared with GB/T 17815-1999 "Determination of propionic acid and propionate in feed", except for editorial modification, the main technical content The changes are as follows. --- Increase the detection limit and limit of quantitation of the method (see Chapter 1); --- Revised the concentration of phosphoric acid in the preparation of sample solution (see 3.5.1,.1999 edition 7.1); --- Increased reagent quartz sand and formic acid in the preparation of sample solution (see 3.5.1); --- The gas chromatographic column was changed from packed column to capillary column, and the chromatographic conditions were changed accordingly. The quantification was changed from the internal standard method to the external standard method (see 3.5.3,.1999 edition 7.2); --- Increased liquid chromatography; --- The result unit is changed from "%" to "mg/kg" (see 3.6, Chapter 8 of the.1999 edition); --- Added informative appendix. This standard is proposed and managed by the National Feed Industry Standardization Technical Committee (SAC/TC76). This standard was drafted. Guoliang Wuhan Scientific Research and Design Institute Co., Ltd. [National Feed Quality Supervision and Inspection Center (Wuhan)]. The main drafters of this standard. Liu Xiaomin, Gao Junfeng, Huang Changjun, Wang Sisi. The previous versions of the standards replaced by this standard are. ---GB/T 17815-1999. Determination of propionic acid and propionate in feed

1 Scope

This standard specifies the gas chromatographic and high performance liquid chromatography methods for the determination of propionic acid and propionate in feed. This standard is applicable to feed materials, compound feeds, concentrated feeds of propionic acid and propionate with propionic acid content below 3000mg/kg (to C Determination of acid meter). The detection limit of gas chromatography in this standard is 30mg/kg, the limit of quantification is 100mg/kg; the detection limit of high performance liquid chromatography is 30mg/kg, the limit of quantification is 100mg/kg.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6682 Analytical laboratory water specifications and test methods GB/T 14699.1 Feed sampling Preparation of GB/T 20195 animal feed samples 3 gas chromatography (arbitration method) 3.1 Principle The propionic acid and propionate in the sample are acidified by phosphoric acid, the propionate is converted into propionic acid, and the steam distillation separates the propionic acid from the substrate, and the distillate is separated. Propionic acid was detected by gas chromatograph with hydrogen flame ionization detector and quantified by external standard method. 3.2 Reagents or materials Only analytically pure reagents were used in the analysis unless otherwise stated. 3.2.1 Water, GB/T 6682, level one. 3.2.2 Phosphoric acid. excellent grade pure. 3.2.3 Sodium chloride. 3.2.4 Quartz sand. 3.2.5 Silicone oil. 3.2.6 Phosphoric acid solution (1 1). Dilute 50 mL of phosphoric acid to 100 mL with water and mix. 3.2.7 Formic acid solution (2 98). Pipette 2 mL of formic acid to 100 mL with water and mix. 3.2.8 Propionic acid standard stock solution. Accurately weigh 1.0310g propionic acid (C3H6O2, purity ≥97%) in a 100mL volumetric flask, add water Dissolve and bring up to volume. Shake well. 1 mL of this solution contained 10 mg of propionic acid, and this solution was stored at 4 ° C for 30 days. 3.2.9 Propionic acid standard working solution. Pipette the standard stock solution of propionic acid (3.2.8) 10.0mL into a 100mL volumetric flask and dilute with water. Rong. 1 mL of this solution contains 1 mg of propionic acid, which is ready for use. 3.2.10 0.45 μm filter. 3.3 Instrumentation 3.3.1 Gas Chromatograph. with a hydrogen flame ionization detector. ...