Digital refractometer colostrum concentration of detailed instructions to use a refractometer manuals, product applications for calves colostrum immunoglobulin absorption rate reached a peak after birth, and decreased rapidly within the next 72 hours. Therefore, as soon as possible to ensure that calves fed colostrum is fully absorb immunoglobulins, get passive immunization, and converted to the key points of active immunization,? The good colostrum quality control is very important. Digital refractometer concentration of colostrum, colostrum concentration tester can quickly and accurately determine the quality of colostrum. Typically, fresh colostrum storage temperature of 0 ± 2 ℃ (slight icing best), better preservation of nutrients, such as bacteria and prevent microbial invasion, when using frozen colostrum is not enough to prepare fresh colostrum, storage temperature is - 18 ℃, but generally with fresh colostrum (0 ± 2 ℃), to ensure the quality and shorten the time of the first feeding of colostrum. Second, the technical parameters of digital refractometer colostrum concentration of fast right calf serum IgG monitoring. When the Mavericks have not fed any colostrum IgG content is zero, because the calf is passive immunization, all of its antibodies from colostrum. When fed colostrum or how to determine what time after the acquisition calf serum judge whether passive immunization success? Acquisition time is very important, relatively stable at 24 ~ 72 h IgG content, so the calves in the pasture to be measured whether passive immunization success 24 ~ 72 h IgG blood without any problems. Criteria for IgG reached 10mg / mL will be successful, it is a standard, while many cattle could not be measured IgG, serum total protein can be used in place of, the requirements of greater than 5.5 mg / dL. Colostrum concentration meter handheld refractometer (Written colostrum concentration) may be considered with each ranch. Model: DR101 measuring range: Brix0.0 to 50.0 percent dissolved values: sugar content (Brix) 0.1% measurement accuracy: Brix ± 0.2% Measurement temperature:? 0-50 degrees (Automatic Temperature Compensation) Sample size: two to three drops of measurement Time: 1 second Dimensions: 25 * 58 * 121mm Weight: 90 g Third, colostrum quality testing test items:? colostrum immunoglobulin IgG content. ? Applicable sample: ranch calves colostrum test conditions:? Apply to professionals and non-professionals QC testing site rapid testing, no special experimental conditions after a large number of proven experts critical value content calf serum total protein as follows: ◆ > 7g / dl: probably dehydrated calves (calves have been sick or for other reasons) ◆ 5.5-7g / dl: ideal value ◆ 5.0-5.4g / dl: the critical value, you can accept the lower limit ◆ 8000 very Good Fourth, the amount of colostrum fed colostrum quality assessment and quality is good or bad judgment substantially in accordance with the content of IgG, IgG when the content is greater than 50 mg / mL, think its quality is quite good. When the IgG content of less than 25 mg / mL of poorer quality. Refractometer general refraction when the percentage is greater than 22% generally means that colostrum IgG content is higher than 50 mg / mL; if less than 19.9%, we believe IgG content of less than 25 mg / mL. From the current data, the hydrometer or refractometer than colostrum count a little better, because limited by temperature, this can directly reflect their quality colostrum. Easy colostrum quality judging table: LgG, mg / ml quality judging hydrometer refractometer> 50 good green> 22% 24.9 to 49.9 20.0 to 21.9 percent yellow generally <25 poor red <19.9%